2521077538 has 12 divisors (see below), whose sum is σ = 4399023222. Its totient is φ = 1080461760.

The previous prime is 2521077521. The next prime is 2521077539. The reversal of 2521077538 is 8357701252.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1537188849 + 983888689 = 39207^2 + 31367^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2521077538.

It is not an unprimeable number, because it can be changed into a prime (2521077539) 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 5 ways as a sum of consecutive naturals, for example, 12862543 + ... + 12862738.

Almost surely, 2^2521077538 is an apocalyptic number.

2521077538 is a deficient number, since it is larger than the sum of its proper divisors (1877945684).

2521077538 is a wasteful number, since it uses less digits than its factorization.

2521077538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25725297 (or 25725290 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 2521077538 is about 50210.3329803737. The cubic root of 2521077538 is about 1361.0123550178.

The spelling of 2521077538 in words is "two billion, five hundred twenty-one million, seventy-seven thousand, five hundred thirty-eight".