2521798612 has 12 divisors (see below), whose sum is σ = 4414793236. Its totient is φ = 1260429120.

The previous prime is 2521798607. The next prime is 2521798613. The reversal of 2521798612 is 2168971252.

It can be written as a sum of positive squares in 2 ways, for example, as 1341463876 + 1180334736 = 36626^2 + 34356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521798613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105339 + ... + 127042.

Almost surely, 2^2521798612 is an apocalyptic number.

It is an amenable number.

2521798612 is a deficient number, since it is larger than the sum of its proper divisors (1892994624).

2521798612 is a wasteful number, since it uses less digits than its factorization.

2521798612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235098 (or 235096 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 2521798612 is about 50217.5130009442. The cubic root of 2521798612 is about 1361.1421007393.

The spelling of 2521798612 in words is "two billion, five hundred twenty-one million, seven hundred ninety-eight thousand, six hundred twelve".