641184320 has 56 divisors (see below), whose sum is σ = 1744943424. Its totient is φ = 219833856.

The previous prime is 641184289. The next prime is 641184337. The reversal of 641184320 is 23481146.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×641184320² = 822234664427724800, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 140882 + ... + 145361.

It is an arithmetic number, because the mean of its divisors is an integer number (31159704).

Almost surely, 2^641184320 is an apocalyptic number.

It is an amenable number.

641184320 is an abundant number, since it is smaller than the sum of its proper divisors (1103759104).

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

641184320 is a wasteful number, since it uses less digits than its factorization.

641184320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286267 (or 286257 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 641184320 is about 25321.6176418490. The cubic root of 641184320 is about 862.3051193113.

The spelling of 641184320 in words is "six hundred forty-one million, one hundred eighty-four thousand, three hundred twenty".