2581610988 has 108 divisors (see below), whose sum is σ = 6923608664. Its totient is φ = 748070400.

The previous prime is 2581610981. The next prime is 2581610989. The reversal of 2581610988 is 8890161852.

It is a super-2 number, since 2×2581610988² = 13329430586724672288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2581610981) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 766428 + ... + 769788.

Almost surely, 2^2581610988 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 2581610988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3461804332).

2581610988 is an abundant number, since it is smaller than the sum of its proper divisors (4341997676).

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

2581610988 is a wasteful number, since it uses less digits than its factorization.

2581610988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 48.

The square root of 2581610988 is about 50809.5560697001. The cubic root of 2581610988 is about 1371.8193789942.

The spelling of 2581610988 in words is "two billion, five hundred eighty-one million, six hundred ten thousand, nine hundred eighty-eight".