12745651994 has 8 divisors (see below), whose sum is σ = 19122103188. Its totient is φ = 6371617600.

The previous prime is 12745651969. The next prime is 12745652011. The reversal of 12745651994 is 49915654721.

It can be written as a sum of positive squares in 2 ways, for example, as 12726772969 + 18879025 = 112813^2 + 4345^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 590957 + ... + 612144.

Almost surely, 2^12745651994 is an apocalyptic number.

12745651994 is a deficient number, since it is larger than the sum of its proper divisors (6376451194).

12745651994 is a wasteful number, since it uses less digits than its factorization.

12745651994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208400.

The product of its digits is 2721600, while the sum is 53.

The spelling of 12745651994 in words is "twelve billion, seven hundred forty-five million, six hundred fifty-one thousand, nine hundred ninety-four".