251560055687 has 2 divisors, whose sum is σ = 251560055688. Its totient is φ = 251560055686.

The previous prime is 251560055653. The next prime is 251560055693. The reversal of 251560055687 is 786550065152.

251560055687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251560055687 - 2¹² = 251560051591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251560055587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125780027843 + 125780027844.

It is an arithmetic number, because the mean of its divisors is an integer number (125780027844).

Almost surely, 2^251560055687 is an apocalyptic number.

251560055687 is a deficient number, since it is larger than the sum of its proper divisors (1).

251560055687 is an equidigital number, since it uses as much as digits as its factorization.

251560055687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520000, while the sum is 50.

The spelling of 251560055687 in words is "two hundred fifty-one billion, five hundred sixty million, fifty-five thousand, six hundred eighty-seven".