76197871656 has 24 divisors (see below), whose sum is σ = 206369235930. Its totient is φ = 25399290528.

The previous prime is 76197871639. The next prime is 76197871703. The reversal of 76197871656 is 65617879167.

76197871656 is a `hidden beast` number, since 7 + 619 + 7 + 8 + 7 + 1 + 6 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41344715556 + 34853156100 = 203334^2 + 186690^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×76197871656² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 76197871593 and 76197871602.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 529151815 + ... + 529151958.

Almost surely, 2^76197871656 is an apocalyptic number.

It is an amenable number.

76197871656 is an abundant number, since it is smaller than the sum of its proper divisors (130171364274).

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

76197871656 is a wasteful number, since it uses less digits than its factorization.

76197871656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058303785 (or 1058303778 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 63.

The spelling of 76197871656 in words is "seventy-six billion, one hundred ninety-seven million, eight hundred seventy-one thousand, six hundred fifty-six".