256252154056 has 16 divisors (see below), whose sum is σ = 481647545100. Its totient is φ = 127812808704.

The previous prime is 256252154051. The next prime is 256252154107. The reversal of 256252154056 is 650451252652.

It can be written as a sum of positive squares in 2 ways, for example, as 188906713956 + 67345440100 = 434634^2 + 259510^2 .

It is a super-2 number, since 2×256252154056² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256252154051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39155065 + ... + 39161608.

Almost surely, 2^256252154056 is an apocalyptic number.

It is an amenable number.

256252154056 is a deficient number, since it is larger than the sum of its proper divisors (225395391044).

256252154056 is a wasteful number, since it uses less digits than its factorization.

256252154056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78317088 (or 78317084 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 256252154056 in words is "two hundred fifty-six billion, two hundred fifty-two million, one hundred fifty-four thousand, fifty-six".