251879042044 has 24 divisors (see below), whose sum is σ = 509418292320. Its totient is φ = 106735259136.

The previous prime is 251879041987. The next prime is 251879042047. The reversal of 251879042044 is 440240978152.

It is a junction number, because it is equal to n+sod(n) for n = 251879041985 and 251879042003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251879042047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50535037 + ... + 50540020.

It is an arithmetic number, because the mean of its divisors is an integer number (21225762180).

Almost surely, 2^251879042044 is an apocalyptic number.

It is an amenable number.

251879042044 is an abundant number, since it is smaller than the sum of its proper divisors (257539250276).

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

251879042044 is a wasteful number, since it uses less digits than its factorization.

251879042044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101075157 (or 101075155 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 251879042044 in words is "two hundred fifty-one billion, eight hundred seventy-nine million, forty-two thousand, forty-four".