251278407132 has 24 divisors (see below), whose sum is σ = 586555958016. Its totient is φ = 83725229808.

The previous prime is 251278407103. The next prime is 251278407181. The reversal of 251278407132 is 231704872152.

It is a happy number.

251278407132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 4249318 + ... + 4308045.

It is an arithmetic number, because the mean of its divisors is an integer number (24439831584).

Almost surely, 2^251278407132 is an apocalyptic number.

It is an amenable number.

251278407132 is an abundant number, since it is smaller than the sum of its proper divisors (335277550884).

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

251278407132 is a wasteful number, since it uses less digits than its factorization.

251278407132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8559817 (or 8559815 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 251278407132 in words is "two hundred fifty-one billion, two hundred seventy-eight million, four hundred seven thousand, one hundred thirty-two".