2581957884 has 96 divisors (see below), whose sum is σ = 6880591872. Its totient is φ = 746424000.

The previous prime is 2581957849. The next prime is 2581957901. The reversal of 2581957884 is 4887591852.

It is a congruent number.

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, 286089 + ... + 294975.

It is an arithmetic number, because the mean of its divisors is an integer number (71672832).

Almost surely, 2^2581957884 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 2581957884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3440295936).

2581957884 is an abundant number, since it is smaller than the sum of its proper divisors (4298633988).

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

2581957884 is a wasteful number, since it uses less digits than its factorization.

2581957884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9007 (or 9005 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 57.

The square root of 2581957884 is about 50812.9696435861. The cubic root of 2581957884 is about 1371.8808209057.

The spelling of 2581957884 in words is "two billion, five hundred eighty-one million, nine hundred fifty-seven thousand, eight hundred eighty-four".