811438057832 has 8 divisors (see below), whose sum is σ = 1521446358450. Its totient is φ = 405719028912.

The previous prime is 811438057813. The next prime is 811438057849. The reversal of 811438057832 is 238750834118.

It can be written as a sum of positive squares in only one way, i.e., 796638362116 + 14799695716 = 892546^2 + 121654^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50714878607 + ... + 50714878622.

Almost surely, 2^811438057832 is an apocalyptic number.

It is an amenable number.

811438057832 is a deficient number, since it is larger than the sum of its proper divisors (710008300618).

811438057832 is a wasteful number, since it uses less digits than its factorization.

811438057832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101429757235 (or 101429757231 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 811438057832 in words is "eight hundred eleven billion, four hundred thirty-eight million, fifty-seven thousand, eight hundred thirty-two".