12650794128 has 90 divisors (see below), whose sum is σ = 41185027494. Its totient is φ = 3614510592.

The previous prime is 12650794109. The next prime is 12650794139. The reversal of 12650794128 is 82149705621.

12650794128 is a `hidden beast` number, since 12 + 6 + 507 + 9 + 4 + 128 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10042444944 + 2608349184 = 100212^2 + 51072^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 889401 + ... + 903512.

Almost surely, 2^12650794128 is an apocalyptic number.

12650794128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12650794128 is an abundant number, since it is smaller than the sum of its proper divisors (28534233366).

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

12650794128 is a wasteful number, since it uses less digits than its factorization.

12650794128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792941 (or 1792925 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 12650794128 in words is "twelve billion, six hundred fifty million, seven hundred ninety-four thousand, one hundred twenty-eight".