76985643880 has 32 divisors (see below), whose sum is σ = 173228625000. Its totient is φ = 30792315136.

The previous prime is 76985643863. The next prime is 76985643883. The reversal of 76985643880 is 8834658967.

It can be written as a sum of positive squares in 4 ways, for example, as 68510968516 + 8474675364 = 261746^2 + 92058^2 .

It is not an unprimeable number, because it can be changed into a prime (76985643883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698634 + ... + 801286.

Almost surely, 2^76985643880 is an apocalyptic number.

It is an amenable number.

76985643880 is an abundant number, since it is smaller than the sum of its proper divisors (96242981120).

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

76985643880 is a wasteful number, since it uses less digits than its factorization.

76985643880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121413 (or 121409 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 76985643880 in words is "seventy-six billion, nine hundred eighty-five million, six hundred forty-three thousand, eight hundred eighty".