2256891672 has 32 divisors (see below), whose sum is σ = 6448262400. Its totient is φ = 644826144.

The previous prime is 2256891653. The next prime is 2256891673. The reversal of 2256891672 is 2761986522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256891673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6716772 + ... + 6717107.

It is an arithmetic number, because the mean of its divisors is an integer number (201508200).

Almost surely, 2^2256891672 is an apocalyptic number.

It is an amenable number.

2256891672 is an abundant number, since it is smaller than the sum of its proper divisors (4191370728).

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

2256891672 is a wasteful number, since it uses less digits than its factorization.

2256891672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13433895 (or 13433891 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 2256891672 is about 47506.7539619368. The cubic root of 2256891672 is about 1311.7072068105.

The spelling of 2256891672 in words is "two billion, two hundred fifty-six million, eight hundred ninety-one thousand, six hundred seventy-two".