641772344 has 32 divisors (see below), whose sum is σ = 1235757600. Its totient is φ = 312276480.

The previous prime is 641772331. The next prime is 641772487. The reversal of 641772344 is 443277146.

It is a junction number, because it is equal to n+sod(n) for n = 641772298 and 641772307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141764 + ... + 146220.

It is an arithmetic number, because the mean of its divisors is an integer number (38617425).

Almost surely, 2^641772344 is an apocalyptic number.

It is an amenable number.

641772344 is a deficient number, since it is larger than the sum of its proper divisors (593985256).

641772344 is a wasteful number, since it uses less digits than its factorization.

641772344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943 (or 4939 counting only the distinct ones).

The product of its digits is 112896, while the sum is 38.

The square root of 641772344 is about 25333.2260874923. The cubic root of 641772344 is about 862.5686426920.

The spelling of 641772344 in words is "six hundred forty-one million, seven hundred seventy-two thousand, three hundred forty-four".