251140040452 has 72 divisors (see below), whose sum is σ = 552840712704. Its totient is φ = 99144799488.

The previous prime is 251140040449. The next prime is 251140040461. The reversal of 251140040452 is 254040041152.

251140040452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 251140040452.

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 23 ways as a sum of consecutive naturals, for example, 645228 + ... + 958435.

It is an arithmetic number, because the mean of its divisors is an integer number (7678343232).

Almost surely, 2^251140040452 is an apocalyptic number.

It is an amenable number.

251140040452 is an abundant number, since it is smaller than the sum of its proper divisors (301700672252).

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

251140040452 is a wasteful number, since it uses less digits than its factorization.

251140040452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603745 (or 1603736 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 251140040452 in words is "two hundred fifty-one billion, one hundred forty million, forty thousand, four hundred fifty-two".