251250012765 has 12 divisors (see below), whose sum is σ = 435500022204. Its totient is φ = 134000006784.

The previous prime is 251250012737. The next prime is 251250012773. The reversal of 251250012765 is 567210052152.

251250012765 is a `hidden beast` number, since 25 + 1 + 2 + 500 + 127 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 42059036889 + 209190975876 = 205083^2 + 457374^2 .

It is not a de Polignac number, because 251250012765 - 2¹⁵ = 251249979997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2791666764 + ... + 2791666853.

It is an arithmetic number, because the mean of its divisors is an integer number (36291668517).

Almost surely, 2^251250012765 is an apocalyptic number.

It is an amenable number.

251250012765 is a deficient number, since it is larger than the sum of its proper divisors (184250009439).

251250012765 is a wasteful number, since it uses less digits than its factorization.

251250012765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5583333628 (or 5583333625 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 251250012765 in words is "two hundred fifty-one billion, two hundred fifty million, twelve thousand, seven hundred sixty-five".