2565344672 has 24 divisors (see below), whose sum is σ = 5509661472. Its totient is φ = 1166065600.

The previous prime is 2565344671. The next prime is 2565344681. The reversal of 2565344672 is 2764435652.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (2565344671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3643604 + ... + 3644307.

It is an arithmetic number, because the mean of its divisors is an integer number (229569228).

Almost surely, 2^2565344672 is an apocalyptic number.

2565344672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2565344672 is an abundant number, since it is smaller than the sum of its proper divisors (2944316800).

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

2565344672 is a wasteful number, since it uses less digits than its factorization.

2565344672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7287932 (or 7287924 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 44.

The square root of 2565344672 is about 50649.2317019716. The cubic root of 2565344672 is about 1368.9321018963.

The spelling of 2565344672 in words is "two billion, five hundred sixty-five million, three hundred forty-four thousand, six hundred seventy-two".