256641437051226 has 24 divisors (see below), whose sum is σ = 556288814963700. Its totient is φ = 85511396757696.

The previous prime is 256641437051143. The next prime is 256641437051257. The reversal of 256641437051226 is 622150734146652.

It is a happy number.

256641437051226 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 41 + 4 + 370 + 5 + 1 + 226 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 215131185357201 + 41510251694025 = 14667351^2 + 6442845^2 .

It is a super-2 number, since 2×256641437051226² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2979032901 + ... + 2979119048.

Almost surely, 2^{256641437051226} is an apocalyptic number.

256641437051226 is an abundant number, since it is smaller than the sum of its proper divisors (299647377912474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256641437051226 is a wasteful number, since it uses less digits than its factorization.

256641437051226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958154350 (or 5958154347 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 54.

The spelling of 256641437051226 in words is "two hundred fifty-six trillion, six hundred forty-one billion, four hundred thirty-seven million, fifty-one thousand, two hundred twenty-six".