251260113664571 has 4 divisors (see below), whose sum is σ = 274101942179544. Its totient is φ = 228418285149600.

The previous prime is 251260113664543. The next prime is 251260113664579. The reversal of 251260113664571 is 175466311062152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251260113664571 is a prime.

It is a super-2 number, since 2×251260113664571² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251260113664579) 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 in 3 ways as a sum of consecutive naturals, for example, 11420914257470 + ... + 11420914257491.

It is an arithmetic number, because the mean of its divisors is an integer number (68525485544886).

Almost surely, 2^{251260113664571} is an apocalyptic number.

251260113664571 is a deficient number, since it is larger than the sum of its proper divisors (22841828514973).

251260113664571 is a wasteful number, since it uses less digits than its factorization.

251260113664571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22841828514972.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 251260113664571 in words is "two hundred fifty-one trillion, two hundred sixty billion, one hundred thirteen million, six hundred sixty-four thousand, five hundred seventy-one".