251812864468 has 48 divisors (see below), whose sum is σ = 504652216320. Its totient is φ = 108890661600.

The previous prime is 251812864447. The next prime is 251812864481. The reversal of 251812864468 is 864468218152.

It is a happy number.

251812864468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

251812864468 is a modest number, since divided by 864468 gives 251812 as remainder.

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 15 ways as a sum of consecutive naturals, for example, 1484046 + ... + 1644997.

It is an arithmetic number, because the mean of its divisors is an integer number (10513587840).

Almost surely, 2^251812864468 is an apocalyptic number.

It is an amenable number.

251812864468 is an abundant number, since it is smaller than the sum of its proper divisors (252839351852).

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

251812864468 is a wasteful number, since it uses less digits than its factorization.

251812864468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129148 (or 3129146 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 55.

The spelling of 251812864468 in words is "two hundred fifty-one billion, eight hundred twelve million, eight hundred sixty-four thousand, four hundred sixty-eight".