15813336812 has 24 divisors (see below), whose sum is σ = 34059495456. Its totient is φ = 6255825408.

The previous prime is 15813336793. The next prime is 15813336821. The reversal of 15813336812 is 21863331851.

It is a super-2 number, since 2×15813336812² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 15813336812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21721253 + ... + 21721980.

It is an arithmetic number, because the mean of its divisors is an integer number (1419145644).

Almost surely, 2^15813336812 is an apocalyptic number.

It is an amenable number.

15813336812 is an abundant number, since it is smaller than the sum of its proper divisors (18246158644).

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

15813336812 is a wasteful number, since it uses less digits than its factorization.

15813336812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43443257 (or 43443255 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The spelling of 15813336812 in words is "fifteen billion, eight hundred thirteen million, three hundred thirty-six thousand, eight hundred twelve".