813223290920 has 64 divisors (see below), whose sum is σ = 1832646911040. Its totient is φ = 324775180800.

The previous prime is 813223290877. The next prime is 813223290949. The reversal of 813223290920 is 29092322318.

813223290920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×813223290920² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73053755 + ... + 73064885.

It is an arithmetic number, because the mean of its divisors is an integer number (28635107985).

Almost surely, 2^813223290920 is an apocalyptic number.

It is an amenable number.

813223290920 is an abundant number, since it is smaller than the sum of its proper divisors (1019423620120).

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

813223290920 is a wasteful number, since it uses less digits than its factorization.

813223290920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13866 (or 13862 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 813223290920 in words is "eight hundred thirteen billion, two hundred twenty-three million, two hundred ninety thousand, nine hundred twenty".