1251250138764 has 24 divisors (see below), whose sum is σ = 3243981841520. Its totient is φ = 417083379552.

The previous prime is 1251250138751. The next prime is 1251250138843. The reversal of 1251250138764 is 4678310521521.

1251250138764 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 2 + 501 + 3 + 87 + 64 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5792824609 + ... + 5792824824.

Almost surely, 2^{1251250138764} is an apocalyptic number.

It is an amenable number.

1251250138764 is an abundant number, since it is smaller than the sum of its proper divisors (1992731702756).

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

1251250138764 is a wasteful number, since it uses less digits than its factorization.

1251250138764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11585649446 (or 11585649438 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 1251250138764 in words is "one trillion, two hundred fifty-one billion, two hundred fifty million, one hundred thirty-eight thousand, seven hundred sixty-four".