76846564640 has 48 divisors (see below), whose sum is σ = 187406472960. Its totient is φ = 29747055360.

The previous prime is 76846564579. The next prime is 76846564657. The reversal of 76846564640 is 4646564867.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7741670 + ... + 7751589.

It is an arithmetic number, because the mean of its divisors is an integer number (3904301520).

Almost surely, 2^76846564640 is an apocalyptic number.

It is an amenable number.

76846564640 is an abundant number, since it is smaller than the sum of its proper divisors (110559908320).

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

76846564640 is a wasteful number, since it uses less digits than its factorization.

76846564640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15493305 (or 15493297 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 56.

The spelling of 76846564640 in words is "seventy-six billion, eight hundred forty-six million, five hundred sixty-four thousand, six hundred forty".