641138592 has 48 divisors (see below), whose sum is σ = 1689049152. Its totient is φ = 212943360.

The previous prime is 641138581. The next prime is 641138623. The reversal of 641138592 is 295831146.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×641138592² = 822117388303484928, 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 641138592.

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, 15093 + ... + 38859.

It is an arithmetic number, because the mean of its divisors is an integer number (35188524).

Almost surely, 2^641138592 is an apocalyptic number.

It is an amenable number.

641138592 is an abundant number, since it is smaller than the sum of its proper divisors (1047910560).

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

641138592 is a wasteful number, since it uses less digits than its factorization.

641138592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24061 (or 24053 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 641138592 is about 25320.7146818568. The cubic root of 641138592 is about 862.2846195243.

The spelling of 641138592 in words is "six hundred forty-one million, one hundred thirty-eight thousand, five hundred ninety-two".