251412989550 has 24 divisors (see below), whose sum is σ = 623504214456. Its totient is φ = 67043463840.

The previous prime is 251412989537. The next prime is 251412989587. The reversal of 251412989550 is 55989214152.

251412989550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 251412989493 and 251412989502.

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 11 ways as a sum of consecutive naturals, for example, 838043149 + ... + 838043448.

It is an arithmetic number, because the mean of its divisors is an integer number (25979342269).

Almost surely, 2^251412989550 is an apocalyptic number.

251412989550 is an abundant number, since it is smaller than the sum of its proper divisors (372091224906).

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

251412989550 is a wasteful number, since it uses less digits than its factorization.

251412989550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676086612 (or 1676086607 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 51.

The spelling of 251412989550 in words is "two hundred fifty-one billion, four hundred twelve million, nine hundred eighty-nine thousand, five hundred fifty".