813554886812 has 48 divisors (see below), whose sum is σ = 1454416236000. Its totient is φ = 398049500160.

The previous prime is 813554886799. The next prime is 813554886841. The reversal of 813554886812 is 218688455318.

It is a super-2 number, since 2×813554886812² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 139090064 + ... + 139095912.

It is an arithmetic number, because the mean of its divisors is an integer number (30300338250).

Almost surely, 2^813554886812 is an apocalyptic number.

It is an amenable number.

813554886812 is a deficient number, since it is larger than the sum of its proper divisors (640861349188).

813554886812 is a wasteful number, since it uses less digits than its factorization.

813554886812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7526 (or 7524 counting only the distinct ones).

The product of its digits is 14745600, while the sum is 59.

The spelling of 813554886812 in words is "eight hundred thirteen billion, five hundred fifty-four million, eight hundred eighty-six thousand, eight hundred twelve".