641404804 has 12 divisors (see below), whose sum is σ = 1122637824. Its totient is φ = 320651144.

The previous prime is 641404789. The next prime is 641404807. The reversal of 641404804 is 408404146.

It is a super-2 number, since 2×641404804² = 822800245188556832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641404807) 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, 35997 + ... + 50779.

It is an arithmetic number, because the mean of its divisors is an integer number (93553152).

Almost surely, 2^641404804 is an apocalyptic number.

It is an amenable number.

641404804 is a deficient number, since it is larger than the sum of its proper divisors (481233020).

641404804 is a wasteful number, since it uses less digits than its factorization.

641404804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25634 (or 25632 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 641404804 is about 25325.9709389393. The cubic root of 641404804 is about 862.4039482479.

The spelling of 641404804 in words is "six hundred forty-one million, four hundred four thousand, eight hundred four".