641205792 has 36 divisors (see below), whose sum is σ = 1823429790. Its totient is φ = 213735168.

The previous prime is 641205781. The next prime is 641205811. The reversal of 641205792 is 297502146.

641205792 is a `hidden beast` number, since 64 + 1 + 20 + 579 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 475414416 + 165791376 = 21804^2 + 12876^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×641205792² = 822289735388694528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1112917 + ... + 1113492.

Almost surely, 2^641205792 is an apocalyptic number.

It is an amenable number.

641205792 is an abundant number, since it is smaller than the sum of its proper divisors (1182223998).

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

641205792 is a wasteful number, since it uses less digits than its factorization.

641205792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226425 (or 2226414 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 641205792 is about 25322.0416238502. The cubic root of 641205792 is about 862.3147448372.

The spelling of 641205792 in words is "six hundred forty-one million, two hundred five thousand, seven hundred ninety-two".