251633056146 has 16 divisors (see below), whose sum is σ = 508454423904. Its totient is φ = 83012966784.

The previous prime is 251633056139. The next prime is 251633056163. The reversal of 251633056146 is 641650336152.

It is a junction number, because it is equal to n+sod(n) for n = 251633056098 and 251633056107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216179020 + ... + 216180183.

It is an arithmetic number, because the mean of its divisors is an integer number (31778401494).

Almost surely, 2^251633056146 is an apocalyptic number.

251633056146 is an abundant number, since it is smaller than the sum of its proper divisors (256821367758).

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

251633056146 is a wasteful number, since it uses less digits than its factorization.

251633056146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432359305.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 251633056146 in words is "two hundred fifty-one billion, six hundred thirty-three million, fifty-six thousand, one hundred forty-six".