6631502464 has 32 divisors (see below), whose sum is σ = 13460477940. Its totient is φ = 3253186560.

The previous prime is 6631502447. The next prime is 6631502491. The reversal of 6631502464 is 4642051366.

It can be written as a sum of positive squares in 2 ways, for example, as 5892097600 + 739404864 = 76760^2 + 27192^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 481977 + ... + 495544.

Almost surely, 2^6631502464 is an apocalyptic number.

6631502464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6631502464 is an abundant number, since it is smaller than the sum of its proper divisors (6828975476).

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

6631502464 is an equidigital number, since it uses as much as digits as its factorization.

6631502464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977588 (or 977576 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 6631502464 is about 81434.0375027543. The cubic root of 6631502464 is about 1878.7571444346.

The spelling of 6631502464 in words is "six billion, six hundred thirty-one million, five hundred two thousand, four hundred sixty-four".