641971504 has 10 divisors (see below), whose sum is σ = 1243819820. Its totient is φ = 320985744.

The previous prime is 641971471. The next prime is 641971513. The reversal of 641971504 is 405179146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20061594 + ... + 20061625.

It is an arithmetic number, because the mean of its divisors is an integer number (124381982).

Almost surely, 2^641971504 is an apocalyptic number.

It is an amenable number.

641971504 is a deficient number, since it is larger than the sum of its proper divisors (601848316).

641971504 is a wasteful number, since it uses less digits than its factorization.

641971504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40123227 (or 40123221 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 641971504 is about 25337.1565886940. The cubic root of 641971504 is about 862.6578598966.

The spelling of 641971504 in words is "six hundred forty-one million, nine hundred seventy-one thousand, five hundred four".