251163708492 has 24 divisors (see below), whose sum is σ = 590663213056. Its totient is φ = 83062013328.

The previous prime is 251163708487. The next prime is 251163708493. The reversal of 251163708492 is 294807361152.

It is not an unprimeable number, because it can be changed into a prime (251163708493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82401268 + ... + 82404315.

It is a 2-persistent number, because it is pandigital, and so is 2⋅251163708492 = 502327416984, but 3⋅251163708492 = 753491125476 is not.

Almost surely, 2^251163708492 is an apocalyptic number.

It is an amenable number.

251163708492 is an abundant number, since it is smaller than the sum of its proper divisors (339499504564).

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

251163708492 is a wasteful number, since it uses less digits than its factorization.

251163708492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164805717 (or 164805715 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 251163708492 in words is "two hundred fifty-one billion, one hundred sixty-three million, seven hundred eight thousand, four hundred ninety-two".