641975464 has 32 divisors (see below), whose sum is σ = 1297739520. Its totient is φ = 295966656.

The previous prime is 641975449. The next prime is 641975479. The reversal of 641975464 is 464579146.

It is an interprime number because it is at equal distance from previous prime (641975449) and next prime (641975479).

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, 107649 + ... + 113455.

It is an arithmetic number, because the mean of its divisors is an integer number (40554360).

Almost surely, 2^641975464 is an apocalyptic number.

It is an amenable number.

641975464 is an abundant number, since it is smaller than the sum of its proper divisors (655764056).

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

641975464 is a wasteful number, since it uses less digits than its factorization.

641975464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889 (or 6885 counting only the distinct ones).

The product of its digits is 725760, while the sum is 46.

The square root of 641975464 is about 25337.2347346746. The cubic root of 641975464 is about 862.6596336608.

The spelling of 641975464 in words is "six hundred forty-one million, nine hundred seventy-five thousand, four hundred sixty-four".