2521957668 has 24 divisors (see below), whose sum is σ = 5901247968. Its totient is φ = 838269696.

The previous prime is 2521957661. The next prime is 2521957687. The reversal of 2521957668 is 8667591252.

It is a self number, because there is not a number n which added to its sum of digits gives 2521957668.

It is not an unprimeable number, because it can be changed into a prime (2521957661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293446 + ... + 301917.

It is an arithmetic number, because the mean of its divisors is an integer number (245885332).

Almost surely, 2^2521957668 is an apocalyptic number.

It is an amenable number.

2521957668 is an abundant number, since it is smaller than the sum of its proper divisors (3379290300).

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

2521957668 is a wasteful number, since it uses less digits than its factorization.

2521957668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595723 (or 595721 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 51.

The square root of 2521957668 is about 50219.0966465945. The cubic root of 2521957668 is about 1361.1707169904.

The spelling of 2521957668 in words is "two billion, five hundred twenty-one million, nine hundred fifty-seven thousand, six hundred sixty-eight".