12813557492 has 12 divisors (see below), whose sum is σ = 23742768420. Its totient is φ = 6029909376.

The previous prime is 12813557467. The next prime is 12813557503. The reversal of 12813557492 is 29475531821.

It can be written as a sum of positive squares in 2 ways, for example, as 10470610276 + 2342947216 = 102326^2 + 48404^2 .

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, 94217267 + ... + 94217402.

It is an arithmetic number, because the mean of its divisors is an integer number (1978564035).

Almost surely, 2^12813557492 is an apocalyptic number.

It is an amenable number.

12813557492 is a deficient number, since it is larger than the sum of its proper divisors (10929210928).

12813557492 is a wasteful number, since it uses less digits than its factorization.

12813557492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188434690 (or 188434688 counting only the distinct ones).

The product of its digits is 604800, while the sum is 47.

The spelling of 12813557492 in words is "twelve billion, eight hundred thirteen million, five hundred fifty-seven thousand, four hundred ninety-two".