2521664012 has 24 divisors (see below), whose sum is σ = 5128811520. Its totient is φ = 1062395280.

The previous prime is 2521664011. The next prime is 2521664017. The reversal of 2521664012 is 2104661252.

It is a super-2 number, since 2×2521664012² = 12717578778831872288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2521664011) by changing a digit.

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, 761564 + ... + 764867.

It is an arithmetic number, because the mean of its divisors is an integer number (213700480).

Almost surely, 2^2521664012 is an apocalyptic number.

It is an amenable number.

2521664012 is an abundant number, since it is smaller than the sum of its proper divisors (2607147508).

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

2521664012 is a wasteful number, since it uses less digits than its factorization.

2521664012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526501 (or 1526499 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2521664012 is about 50216.1728131486. The cubic root of 2521664012 is about 1361.1178835020.

The spelling of 2521664012 in words is "two billion, five hundred twenty-one million, six hundred sixty-four thousand, twelve".