2521641366 has 24 divisors (see below), whose sum is σ = 5479314984. Its totient is φ = 838122720.

The previous prime is 2521641359. The next prime is 2521641371. The reversal of 2521641366 is 6631461252.

2521641366 is a `hidden beast` number, since 2 + 5 + 2 + 1 + 641 + 3 + 6 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2521641366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195615 + ... + 208106.

It is an arithmetic number, because the mean of its divisors is an integer number (228304791).

Almost surely, 2^2521641366 is an apocalyptic number.

2521641366 is an abundant number, since it is smaller than the sum of its proper divisors (2957673618).

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

2521641366 is a wasteful number, since it uses less digits than its factorization.

2521641366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404076 (or 404073 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2521641366 is about 50215.9473275174. The cubic root of 2521641366 is about 1361.1138089481.

The spelling of 2521641366 in words is "two billion, five hundred twenty-one million, six hundred forty-one thousand, three hundred sixty-six".