2256656464020 has 48 divisors (see below), whose sum is σ = 7221300686208. Its totient is φ = 515807191680.

The previous prime is 2256656464009. The next prime is 2256656464021. The reversal of 2256656464020 is 204646566522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256656464021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2686495371 + ... + 2686496210.

It is an arithmetic number, because the mean of its divisors is an integer number (150443764296).

Almost surely, 2^{2256656464020} is an apocalyptic number.

2256656464020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2256656464020 is an abundant number, since it is smaller than the sum of its proper divisors (4964644222188).

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

2256656464020 is a wasteful number, since it uses less digits than its factorization.

2256656464020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372991600 (or 5372991598 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 2256656464020 in words is "two trillion, two hundred fifty-six billion, six hundred fifty-six million, four hundred sixty-four thousand, twenty".