2565124644 has 24 divisors (see below), whose sum is σ = 5986730848. Its totient is φ = 854835840.

The previous prime is 2565124637. The next prime is 2565124663. The reversal of 2565124644 is 4464215652.

It is a super-2 number, since 2×2565124644² = 13159728878512253472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31299 + ... + 78165.

Almost surely, 2^2565124644 is an apocalyptic number.

It is an amenable number.

2565124644 is an abundant number, since it is smaller than the sum of its proper divisors (3421606204).

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

2565124644 is a wasteful number, since it uses less digits than its factorization.

2565124644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51435 (or 51433 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

The square root of 2565124644 is about 50647.0595790121. The cubic root of 2565124644 is about 1368.8929632954.

The spelling of 2565124644 in words is "two billion, five hundred sixty-five million, one hundred twenty-four thousand, six hundred forty-four".