251361160042 has 16 divisors (see below), whose sum is σ = 387262632960. Its totient is φ = 122274152208.

The previous prime is 251361160019. The next prime is 251361160051. The reversal of 251361160042 is 240061163152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 251361159986 and 251361160013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858759 + ... + 1113637.

It is an arithmetic number, because the mean of its divisors is an integer number (24203914560).

Almost surely, 2^251361160042 is an apocalyptic number.

251361160042 is a deficient number, since it is larger than the sum of its proper divisors (135901472918).

251361160042 is a wasteful number, since it uses less digits than its factorization.

251361160042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268245.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 251361160042 in words is "two hundred fifty-one billion, three hundred sixty-one million, one hundred sixty thousand, forty-two".