641925280 has 24 divisors (see below), whose sum is σ = 1516548852. Its totient is φ = 256770048.

The previous prime is 641925217. The next prime is 641925289. The reversal of 641925280 is 82529146.

It can be written as a sum of positive squares in 2 ways, for example, as 640494864 + 1430416 = 25308^2 + 1196^2 .

It is not an unprimeable number, because it can be changed into a prime (641925289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2005857 + ... + 2006176.

Almost surely, 2^641925280 is an apocalyptic number.

It is an amenable number.

641925280 is an abundant number, since it is smaller than the sum of its proper divisors (874623572).

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

641925280 is a wasteful number, since it uses less digits than its factorization.

641925280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012048 (or 4012040 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 641925280 is about 25336.2443941481. The cubic root of 641925280 is about 862.6371546920.

The spelling of 641925280 in words is "six hundred forty-one million, nine hundred twenty-five thousand, two hundred eighty".