2521949872 has 40 divisors (see below), whose sum is σ = 5288942736. Its totient is φ = 1158049536.

The previous prime is 2521949861. The next prime is 2521949879. The reversal of 2521949872 is 2789491252.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2521949879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10203 + ... + 71749.

Almost surely, 2^2521949872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521949872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2644471368).

2521949872 is an abundant number, since it is smaller than the sum of its proper divisors (2766992864).

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

2521949872 is a wasteful number, since it uses less digits than its factorization.

2521949872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61765 (or 61759 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The square root of 2521949872 is about 50219.0190266596. The cubic root of 2521949872 is about 1361.1693144162.

The spelling of 2521949872 in words is "two billion, five hundred twenty-one million, nine hundred forty-nine thousand, eight hundred seventy-two".