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68253152471 = 721997697507
BaseRepresentation
bin111111100100001101…
…000111010011010111
320112011200100101112222
4333210031013103113
52104240301334341
651204405532555
74634243136500
oct774415072327
9215150311488
1068253152471
1126a45141729
1211289a1415b
13658957786a
143436a17ba7
151b970a644b
hexfe43474d7

68253152471 has 12 divisors (see below), whose sum is σ = 79436396088. Its totient is φ = 58473322992.

The previous prime is 68253152467. The next prime is 68253152483. The reversal of 68253152471 is 17425135286.

It is not a de Polignac number, because 68253152471 - 22 = 68253152467 is a prime.

It is a super-3 number, since 3×682531524713 (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68253152171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250901 + ... + 446606.

It is an arithmetic number, because the mean of its divisors is an integer number (6619699674).

Almost surely, 268253152471 is an apocalyptic number.

68253152471 is a deficient number, since it is larger than the sum of its proper divisors (11183243617).

68253152471 is a wasteful number, since it uses less digits than its factorization.

68253152471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699518 (or 699511 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The spelling of 68253152471 in words is "sixty-eight billion, two hundred fifty-three million, one hundred fifty-two thousand, four hundred seventy-one".

Divisors: 1 7 49 1997 13979 97853 697507 4882549 34177843 1392921479 9750450353 68253152471