2521644944 has 120 divisors (see below), whose sum is σ = 6099609600. Its totient is φ = 988775424.

The previous prime is 2521644943. The next prime is 2521644947. The reversal of 2521644944 is 4494461252.

2521644944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2521644943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2403332 + ... + 2404380.

It is an arithmetic number, because the mean of its divisors is an integer number (50830080).

Almost surely, 2^2521644944 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 2521644944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3049804800).

2521644944 is an abundant number, since it is smaller than the sum of its proper divisors (3577964656).

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

2521644944 is a wasteful number, since it uses less digits than its factorization.

2521644944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1198 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 2521644944 is about 50215.9829536374. The cubic root of 2521644944 is about 1361.1144527170.

The spelling of 2521644944 in words is "two billion, five hundred twenty-one million, six hundred forty-four thousand, nine hundred forty-four".