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80760895640 = 23517764915527
BaseRepresentation
bin100101100110110111…
…0010111100010011000
321201110100212120120222
41023031232113202120
52310344242130030
6101033454135212
75556221200145
oct1131556274230
9251410776528
1080760895640
1131283469257
121379a7b1508
137800975a19
143ca1c453cc
15217a1be3e5
hex12cdb97898

80760895640 has 64 divisors (see below), whose sum is σ = 192438504000. Its totient is φ = 30398169088.

The previous prime is 80760895627. The next prime is 80760895643. The reversal of 80760895640 is 4659806708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80760895643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5193557 + ... + 5209083.

It is an arithmetic number, because the mean of its divisors is an integer number (3006851625).

Almost surely, 280760895640 is an apocalyptic number.

It is an amenable number.

80760895640 is an abundant number, since it is smaller than the sum of its proper divisors (111677608360).

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

80760895640 is a wasteful number, since it uses less digits than its factorization.

80760895640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23204 (or 23200 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 80760895640 in words is "eighty billion, seven hundred sixty million, eight hundred ninety-five thousand, six hundred forty".

Divisors: 1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680 7649 15298 15527 30596 31054 38245 61192 62108 76490 77635 124216 130033 152980 155270 260066 263959 305960 310540 520132 527918 621080 650165 1040264 1055836 1300330 1319795 2111672 2600660 2639590 5201320 5279180 10558360 118766023 237532046 475064092 593830115 950128184 1187660230 2019022391 2375320460 4038044782 4750640920 8076089564 10095111955 16152179128 20190223910 40380447820 80760895640