251533516355116 has 6 divisors (see below), whose sum is σ = 440183653621460. Its totient is φ = 125766758177556.

The previous prime is 251533516355057. The next prime is 251533516355119. The reversal of 251533516355116 is 611553615335152.

It is not an unprimeable number, because it can be changed into a prime (251533516355119) by changing a digit.

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 as a sum of consecutive naturals, namely, 31441689544386 + ... + 31441689544393.

Almost surely, 2^{251533516355116} is an apocalyptic number.

It is an amenable number.

251533516355116 is a deficient number, since it is larger than the sum of its proper divisors (188650137266344).

251533516355116 is a wasteful number, since it uses less digits than its factorization.

251533516355116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62883379088783 (or 62883379088781 counting only the distinct ones).

The product of its digits is 6075000, while the sum is 52.

The spelling of 251533516355116 in words is "two hundred fifty-one trillion, five hundred thirty-three billion, five hundred sixteen million, three hundred fifty-five thousand, one hundred sixteen".