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80649312200 = 23524324672
BaseRepresentation
bin100101100011100010…
…0101101011111001000
321201011120220112212222
41023013010231133020
52310132210442300
6101014430353212
75553364562042
oct1130704553710
9251146815788
1080649312200
1131226485a36
121376935b808
1377b3807a12
143c910baa92
1521704cc785
hex12c712d7c8

80649312200 has 108 divisors (see below), whose sum is σ = 192383706465. Its totient is φ = 31442026560.

The previous prime is 80649312187. The next prime is 80649312269. The reversal of 80649312200 is 221394608.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 79036325956 + 1612986244 = 281134^2 + 40162^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=200810.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 172696367 + ... + 172696833.

Almost surely, 280649312200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80649312200

80649312200 is an abundant number, since it is smaller than the sum of its proper divisors (111734394265).

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

80649312200 is an equidigital number, since it uses as much as digits as its factorization.

80649312200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 80649312200 in words is "eighty billion, six hundred forty-nine million, three hundred twelve thousand, two hundred".

Divisors: 1 2 4 5 8 10 20 25 40 43 50 86 100 172 200 215 344 430 467 860 934 1075 1720 1849 1868 2150 2335 3698 3736 4300 4670 7396 8600 9245 9340 11675 14792 18490 18680 20081 23350 36980 40162 46225 46700 73960 80324 92450 93400 100405 160648 184900 200810 218089 369800 401620 436178 502025 803240 863483 872356 1004050 1090445 1726966 1744712 2008100 2180890 3453932 4016200 4317415 4361780 5452225 6907864 8634830 8723560 9377827 10904450 17269660 18755654 21587075 21808900 34539320 37511308 43174150 43617800 46889135 75022616 86348300 93778270 172696600 187556540 234445675 375113080 403246561 468891350 806493122 937782700 1612986244 1875565400 2016232805 3225972488 4032465610 8064931220 10081164025 16129862440 20162328050 40324656100 80649312200