12815593108 has 12 divisors (see below), whose sum is σ = 22577807700. Its totient is φ = 6364790912.

The previous prime is 12815593073. The next prime is 12815593111. The reversal of 12815593108 is 80139551821.

It can be written as a sum of positive squares in 2 ways, for example, as 6779546244 + 6036046864 = 82338^2 + 77692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10750741 + ... + 10751932.

It is an arithmetic number, because the mean of its divisors is an integer number (1881483975).

Almost surely, 2^12815593108 is an apocalyptic number.

It is an amenable number.

12815593108 is a deficient number, since it is larger than the sum of its proper divisors (9762214592).

12815593108 is a wasteful number, since it uses less digits than its factorization.

12815593108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21502826 (or 21502824 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 43.

The spelling of 12815593108 in words is "twelve billion, eight hundred fifteen million, five hundred ninety-three thousand, one hundred eight".