6321504664 has 16 divisors (see below), whose sum is σ = 12047130720. Its totient is φ = 3108936480.

The previous prime is 6321504643. The next prime is 6321504671. The reversal of 6321504664 is 4664051236.

It is a super-2 number, since 2×6321504664² = 79922842433947505792, which contains 22 as substring.

It is a congruent number.

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, 6476464 + ... + 6477439.

It is an arithmetic number, because the mean of its divisors is an integer number (752945670).

Almost surely, 2^6321504664 is an apocalyptic number.

It is an amenable number.

6321504664 is a deficient number, since it is larger than the sum of its proper divisors (5725626056).

6321504664 is a wasteful number, since it uses less digits than its factorization.

6321504664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12953970 (or 12953966 counting only the distinct ones).

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

The square root of 6321504664 is about 79507.8905769736. The cubic root of 6321504664 is about 1849.0138073692.

The spelling of 6321504664 in words is "six billion, three hundred twenty-one million, five hundred four thousand, six hundred sixty-four".