2256866401 has 4 divisors (see below), whose sum is σ = 2256962500. Its totient is φ = 2256770304.

The previous prime is 2256866347. The next prime is 2256866441. The reversal of 2256866401 is 1046686522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1548029025 + 708837376 = 39345^2 + 26624^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256866401 - 2⁷ = 2256866273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256866441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13225 + ... + 68473.

It is an arithmetic number, because the mean of its divisors is an integer number (564240625).

Almost surely, 2^2256866401 is an apocalyptic number.

It is an amenable number.

2256866401 is a deficient number, since it is larger than the sum of its proper divisors (96099).

2256866401 is an equidigital number, since it uses as much as digits as its factorization.

2256866401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96098.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 2256866401 is about 47506.4879884843. The cubic root of 2256866401 is about 1311.7023109506.

The spelling of 2256866401 in words is "two billion, two hundred fifty-six million, eight hundred sixty-six thousand, four hundred one".