7657664928 has 24 divisors (see below), whose sum is σ = 20101370688. Its totient is φ = 2552554944.

The previous prime is 7657664923. The next prime is 7657664941. The reversal of 7657664928 is 8294667567.

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

It is not an unprimeable number, because it can be changed into a prime (7657664923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39883576 + ... + 39883767.

It is an arithmetic number, because the mean of its divisors is an integer number (837557112).

Almost surely, 2^7657664928 is an apocalyptic number.

It is an amenable number.

7657664928 is an abundant number, since it is smaller than the sum of its proper divisors (12443705760).

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

7657664928 is a wasteful number, since it uses less digits than its factorization.

7657664928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79767356 (or 79767348 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 60.

The square root of 7657664928 is about 87508.0849293367. The cubic root of 7657664928 is about 1971.0551973671.

The spelling of 7657664928 in words is "seven billion, six hundred fifty-seven million, six hundred sixty-four thousand, nine hundred twenty-eight".