76640396720 has 20 divisors (see below), whose sum is σ = 178188922560. Its totient is φ = 30656158656.

The previous prime is 76640396699. The next prime is 76640396737. The reversal of 76640396720 is 2769304667.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479002400 + ... + 479002559.

It is an arithmetic number, because the mean of its divisors is an integer number (8909446128).

Almost surely, 2^76640396720 is an apocalyptic number.

It is an amenable number.

76640396720 is an abundant number, since it is smaller than the sum of its proper divisors (101548525840).

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

76640396720 is a wasteful number, since it uses less digits than its factorization.

76640396720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958004972 (or 958004966 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 50.

The spelling of 76640396720 in words is "seventy-six billion, six hundred forty million, three hundred ninety-six thousand, seven hundred twenty".