12990185876 has 12 divisors (see below), whose sum is σ = 23516716020. Its totient is φ = 6271124160.

The previous prime is 12990185839. The next prime is 12990185903. The reversal of 12990185876 is 67858109921.

It can be written as a sum of positive squares in 2 ways, for example, as 11009045776 + 1981140100 = 104924^2 + 44510^2 .

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, 55992065 + ... + 55992296.

It is an arithmetic number, because the mean of its divisors is an integer number (1959726335).

Almost surely, 2^12990185876 is an apocalyptic number.

It is an amenable number.

12990185876 is a deficient number, since it is larger than the sum of its proper divisors (10526530144).

12990185876 is a wasteful number, since it uses less digits than its factorization.

12990185876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111984394 (or 111984392 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 12990185876 in words is "twelve billion, nine hundred ninety million, one hundred eighty-five thousand, eight hundred seventy-six".