813616705776 has 40 divisors (see below), whose sum is σ = 2402106465664. Its totient is φ = 232461915840.

The previous prime is 813616705751. The next prime is 813616705817. The reversal of 813616705776 is 677507616318.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210738810 + ... + 1210739481.

Almost surely, 2^813616705776 is an apocalyptic number.

It is an amenable number.

813616705776 is an abundant number, since it is smaller than the sum of its proper divisors (1588489759888).

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

813616705776 is a wasteful number, since it uses less digits than its factorization.

813616705776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421478309 (or 2421478303 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 57.

The spelling of 813616705776 in words is "eight hundred thirteen billion, six hundred sixteen million, seven hundred five thousand, seven hundred seventy-six".