2521563564 has 24 divisors (see below), whose sum is σ = 6336237040. Its totient is φ = 775865664.

The previous prime is 2521563557. The next prime is 2521563571. The reversal of 2521563564 is 4653651252.

It is an interprime number because it is at equal distance from previous prime (2521563557) and next prime (2521563571).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8081779 + ... + 8082090.

Almost surely, 2^2521563564 is an apocalyptic number.

It is an amenable number.

2521563564 is an abundant number, since it is smaller than the sum of its proper divisors (3814673476).

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

2521563564 is a wasteful number, since it uses less digits than its factorization.

2521563564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16163889 (or 16163887 counting only the distinct ones).

The product of its digits is 216000, while the sum is 39.

The square root of 2521563564 is about 50215.1726473185. The cubic root of 2521563564 is about 1361.0998103323.

The spelling of 2521563564 in words is "two billion, five hundred twenty-one million, five hundred sixty-three thousand, five hundred sixty-four".