251266375287 has 6 divisors (see below), whose sum is σ = 362940319872. Its totient is φ = 167510916852.

The previous prime is 251266375141. The next prime is 251266375307. The reversal of 251266375287 is 782573662152.

251266375287 is a `hidden beast` number, since 2 + 5 + 1 + 266 + 375 + 2 + 8 + 7 = 666.

251266375287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 251266375287 - 2¹⁶ = 251266309751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251266375687) 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 in 5 ways as a sum of consecutive naturals, for example, 13959243063 + ... + 13959243080.

It is an arithmetic number, because the mean of its divisors is an integer number (60490053312).

Almost surely, 2^251266375287 is an apocalyptic number.

251266375287 is a deficient number, since it is larger than the sum of its proper divisors (111673944585).

251266375287 is a wasteful number, since it uses less digits than its factorization.

251266375287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27918486149 (or 27918486146 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The spelling of 251266375287 in words is "two hundred fifty-one billion, two hundred sixty-six million, three hundred seventy-five thousand, two hundred eighty-seven".