641564652 has 24 divisors (see below), whose sum is σ = 1503585216. Its totient is φ = 212911888.

The previous prime is 641564557. The next prime is 641564653. The reversal of 641564652 is 256465146.

It is a super-2 number, since 2×641564652² = 823210405391762208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641564652.

It is not an unprimeable number, because it can be changed into a prime (641564653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115038 + ... + 120485.

It is an arithmetic number, because the mean of its divisors is an integer number (62649384).

Almost surely, 2^641564652 is an apocalyptic number.

It is an amenable number.

641564652 is an abundant number, since it is smaller than the sum of its proper divisors (862020564).

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

641564652 is a wasteful number, since it uses less digits than its factorization.

641564652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235757 (or 235755 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 641564652 is about 25329.1265542261. The cubic root of 641564652 is about 862.4755837659.

The spelling of 641564652 in words is "six hundred forty-one million, five hundred sixty-four thousand, six hundred fifty-two".