2256166346564 has 12 divisors (see below), whose sum is σ = 4252005807084. Its totient is φ = 1041307544544.

The previous prime is 2256166346543. The next prime is 2256166346617. The reversal of 2256166346564 is 4656436616522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 935781500164 + 1320384846400 = 967358^2 + 1149080^2 .

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 3 ways as a sum of consecutive naturals, for example, 21693907127 + ... + 21693907230.

It is an arithmetic number, because the mean of its divisors is an integer number (354333817257).

Almost surely, 2^{2256166346564} is an apocalyptic number.

It is an amenable number.

2256166346564 is a deficient number, since it is larger than the sum of its proper divisors (1995839460520).

2256166346564 is a wasteful number, since it uses less digits than its factorization.

2256166346564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43387814374 (or 43387814372 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 56.

The spelling of 2256166346564 in words is "two trillion, two hundred fifty-six billion, one hundred sixty-six million, three hundred forty-six thousand, five hundred sixty-four".