2521663144 has 128 divisors (see below), whose sum is σ = 6624737280. Its totient is φ = 867398400.

The previous prime is 2521663117. The next prime is 2521663153. The reversal of 2521663144 is 4413661252.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177339 + ... + 191029.

It is an arithmetic number, because the mean of its divisors is an integer number (51755760).

Almost surely, 2^2521663144 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 2521663144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3312368640).

2521663144 is an abundant number, since it is smaller than the sum of its proper divisors (4103074136).

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

2521663144 is a wasteful number, since it uses less digits than its factorization.

2521663144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13751 (or 13747 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 2521663144 is about 50216.1641705139. The cubic root of 2521663144 is about 1361.1177273286.

The spelling of 2521663144 in words is "two billion, five hundred twenty-one million, six hundred sixty-three thousand, one hundred forty-four".