2556464422266 has 24 divisors (see below), whose sum is σ = 5540608641204. Its totient is φ = 851908285440.

The previous prime is 2556464422243. The next prime is 2556464422319. The reversal of 2556464422266 is 6622244646552.

2556464422266 is a `hidden beast` number, since 2 + 556 + 4 + 6 + 4 + 4 + 2 + 22 + 66 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2497332287025 + 59132135241 = 1580295^2 + 243171^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20479545 + ... + 20603996.

Almost surely, 2^{2556464422266} is an apocalyptic number.

2556464422266 is an abundant number, since it is smaller than the sum of its proper divisors (2984144218938).

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

2556464422266 is a wasteful number, since it uses less digits than its factorization.

2556464422266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41087006 (or 41087003 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 54.

The spelling of 2556464422266 in words is "two trillion, five hundred fifty-six billion, four hundred sixty-four million, four hundred twenty-two thousand, two hundred sixty-six".