2516543664 has 20 divisors (see below), whose sum is σ = 6501071256. Its totient is φ = 838847872.

The previous prime is 2516543639. The next prime is 2516543671. The reversal of 2516543664 is 4663456152.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26213949 + ... + 26214044.

Almost surely, 2^2516543664 is an apocalyptic number.

2516543664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2516543664 is an abundant number, since it is smaller than the sum of its proper divisors (3984527592).

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

2516543664 is a wasteful number, since it uses less digits than its factorization.

2516543664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52428004 (or 52427998 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The square root of 2516543664 is about 50165.1638490297. The cubic root of 2516543664 is about 1360.1959896323.

The spelling of 2516543664 in words is "two billion, five hundred sixteen million, five hundred forty-three thousand, six hundred sixty-four".