641577372 has 24 divisors (see below), whose sum is σ = 1531829376. Its totient is φ = 208885488.

The previous prime is 641577319. The next prime is 641577397. The reversal of 641577372 is 273775146.

It is a congruent number.

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, 621168 + ... + 622199.

It is an arithmetic number, because the mean of its divisors is an integer number (63826224).

Almost surely, 2^641577372 is an apocalyptic number.

It is an amenable number.

641577372 is an abundant number, since it is smaller than the sum of its proper divisors (890252004).

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

641577372 is a wasteful number, since it uses less digits than its factorization.

641577372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243417 (or 1243415 counting only the distinct ones).

The product of its digits is 246960, while the sum is 42.

The square root of 641577372 is about 25329.3776473091. The cubic root of 641577372 is about 862.4812836938.

The spelling of 641577372 in words is "six hundred forty-one million, five hundred seventy-seven thousand, three hundred seventy-two".