641676892 has 12 divisors (see below), whose sum is σ = 1182036520. Its totient is φ = 303952176.

The previous prime is 641676863. The next prime is 641676923. The reversal of 641676892 is 298676146.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4221483 + ... + 4221634.

Almost surely, 2^641676892 is an apocalyptic number.

It is an amenable number.

641676892 is a deficient number, since it is larger than the sum of its proper divisors (540359628).

641676892 is a wasteful number, since it uses less digits than its factorization.

641676892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8443140 (or 8443138 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 641676892 is about 25331.3420884090. The cubic root of 641676892 is about 862.5258767564.

The spelling of 641676892 in words is "six hundred forty-one million, six hundred seventy-six thousand, eight hundred ninety-two".