251129122116502 has 16 divisors (see below), whose sum is σ = 453165333143040. Its totient is φ = 101962199956968.

The previous prime is 251129122116497. The next prime is 251129122116533. The reversal of 251129122116502 is 205611221921152.

It is a happy number.

It is a congruent number.

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, 472047221758 + ... + 472047222289.

It is an arithmetic number, because the mean of its divisors is an integer number (28322833321440).

Almost surely, 2^{251129122116502} is an apocalyptic number.

251129122116502 is a deficient number, since it is larger than the sum of its proper divisors (202036211026538).

251129122116502 is a wasteful number, since it uses less digits than its factorization.

251129122116502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944094444075.

The product of its (nonzero) digits is 43200, while the sum is 40.

The spelling of 251129122116502 in words is "two hundred fifty-one trillion, one hundred twenty-nine billion, one hundred twenty-two million, one hundred sixteen thousand, five hundred two".