251613102461 has 16 divisors (see below), whose sum is σ = 317710957824. Its totient is φ = 194156692224.

The previous prime is 251613102449. The next prime is 251613102463. The reversal of 251613102461 is 164201316152.

It is a cyclic number.

It is not a de Polignac number, because 251613102461 - 2²⁶ = 251545993597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251613102463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45962390 + ... + 45967863.

It is an arithmetic number, because the mean of its divisors is an integer number (19856934864).

Almost surely, 2^251613102461 is an apocalyptic number.

It is an amenable number.

251613102461 is a deficient number, since it is larger than the sum of its proper divisors (66097855363).

251613102461 is a wasteful number, since it uses less digits than its factorization.

251613102461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91930300.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 251613102461 in words is "two hundred fifty-one billion, six hundred thirteen million, one hundred two thousand, four hundred sixty-one".