641327265992 has 32 divisors (see below), whose sum is σ = 1376261613120. Its totient is φ = 274456762560.

The previous prime is 641327265923. The next prime is 641327266001. The reversal of 641327265992 is 299562723146.

It is a super-2 number, since 2×641327265992² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8248043 + ... + 8325434.

It is an arithmetic number, because the mean of its divisors is an integer number (43008175410).

Almost surely, 2^641327265992 is an apocalyptic number.

It is an amenable number.

641327265992 is an abundant number, since it is smaller than the sum of its proper divisors (734934347128).

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

641327265992 is a wasteful number, since it uses less digits than its factorization.

641327265992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16574181 (or 16574177 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 56.

The spelling of 641327265992 in words is "six hundred forty-one billion, three hundred twenty-seven million, two hundred sixty-five thousand, nine hundred ninety-two".