641873939812 has 24 divisors (see below), whose sum is σ = 1283855203904. Its totient is φ = 275065833312.

The previous prime is 641873939737. The next prime is 641873939831. The reversal of 641873939812 is 218939378146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615198 + ... + 1289269.

Almost surely, 2^641873939812 is an apocalyptic number.

It is an amenable number.

641873939812 is an abundant number, since it is smaller than the sum of its proper divisors (641981264092).

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

641873939812 is a wasteful number, since it uses less digits than its factorization.

641873939812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916515 (or 1916513 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 61.

The spelling of 641873939812 in words is "six hundred forty-one billion, eight hundred seventy-three million, nine hundred thirty-nine thousand, eight hundred twelve".