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7980873456660 = 22351331210647127
BaseRepresentation
bin111010000100011000100…
…1000001001110000010100
31001020222000210102022220020
41310020301020021300110
52021224312101103120
624550210155505140
71452412325040216
oct164106110116024
931228023368806
107980873456660
1125a7740007125
12a8a8b64581b0
1345b79317b3b0
141d83c23a45b6
15dc902c31640
hex74231209c14

7980873456660 has 144 divisors (see below), whose sum is σ = 24866750740608. Its totient is φ = 1901150818560.

The previous prime is 7980873456631. The next prime is 7980873456667. The reversal of 7980873456660 is 666543780897.

It is a super-2 number, since 2×79808734566602 (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7980873456667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4573984 + ... + 6073143.

It is an arithmetic number, because the mean of its divisors is an integer number (172685769032).

Almost surely, 27980873456660 is an apocalyptic number.

It is an amenable number.

7980873456660 is an abundant number, since it is smaller than the sum of its proper divisors (16885877283948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7980873456660 is a wasteful number, since it uses less digits than its factorization.

7980873456660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10647214 (or 10647181 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 69.

The spelling of 7980873456660 in words is "seven trillion, nine hundred eighty billion, eight hundred seventy-three million, four hundred fifty-six thousand, six hundred sixty".

Divisors: 1 2 3 4 5 6 10 12 13 15 20 26 30 31 39 52 60 62 65 78 93 124 130 155 156 186 195 260 310 372 390 403 465 620 780 806 930 961 1209 1612 1860 1922 2015 2418 2883 3844 4030 4805 4836 5766 6045 8060 9610 11532 12090 12493 14415 19220 24180 24986 28830 37479 49972 57660 62465 74958 124930 149916 187395 249860 374790 749580 10647127 21294254 31941381 42588508 53235635 63882762 106471270 127765524 138412651 159706905 212942540 276825302 319413810 330060937 415237953 553650604 638827620 660121874 692063255 830475906 990182811 1320243748 1384126510 1650304685 1660951812 1980365622 2076189765 2768253020 3300609370 3960731244 4152379530 4290792181 4950914055 6601218740 8304759060 8581584362 9901828110 10231889047 12872376543 17163168724 19803656220 20463778094 21453960905 25744753086 30695667141 40927556188 42907921810 51159445235 51489506172 61391334282 64361882715 85815843620 102318890470 122782668564 128723765430 133014557611 153478335705 204637780940 257447530860 266029115222 306956671410 399043672833 532058230444 613913342820 665072788055 798087345666 1330145576110 1596174691332 1995218364165 2660291152220 3990436728330 7980873456660