1251250138763 has 16 divisors (see below), whose sum is σ = 1328057533440. Its totient is φ = 1174800122496.

The previous prime is 1251250138751. The next prime is 1251250138843. The reversal of 1251250138763 is 3678310521521.

It is a cyclic number.

It is not a de Polignac number, because 1251250138763 - 2³² = 1246955171467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251250128763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34039448 + ... + 34076186.

It is an arithmetic number, because the mean of its divisors is an integer number (83003595840).

Almost surely, 2^{1251250138763} is an apocalyptic number.

1251250138763 is a deficient number, since it is larger than the sum of its proper divisors (76807394677).

1251250138763 is a wasteful number, since it uses less digits than its factorization.

1251250138763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41546.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 1251250138763 in words is "one trillion, two hundred fifty-one billion, two hundred fifty million, one hundred thirty-eight thousand, seven hundred sixty-three".