251056544061 has 16 divisors (see below), whose sum is σ = 364510411200. Its totient is φ = 153094370688.

The previous prime is 251056544047. The next prime is 251056544113. The reversal of 251056544061 is 160445650152.

It is not a de Polignac number, because 251056544061 - 2¹⁰ = 251056543037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251056544041) 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, 75938016 + ... + 75941321.

It is an arithmetic number, because the mean of its divisors is an integer number (22781900700).

Almost surely, 2^251056544061 is an apocalyptic number.

It is an amenable number.

251056544061 is a deficient number, since it is larger than the sum of its proper divisors (113453867139).

251056544061 is a wasteful number, since it uses less digits than its factorization.

251056544061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151879388.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 251056544061 in words is "two hundred fifty-one billion, fifty-six million, five hundred forty-four thousand, sixty-one".