2551572684 has 96 divisors (see below), whose sum is σ = 6731424000. Its totient is φ = 835705728.

The previous prime is 2551572679. The next prime is 2551572697. The reversal of 2551572684 is 4862751552.

2551572684 is a `hidden beast` number, since 2 + 5 + 515 + 72 + 68 + 4 = 666.

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, 1719807 + ... + 1721289.

It is an arithmetic number, because the mean of its divisors is an integer number (70119000).

Almost surely, 2^2551572684 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 2551572684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3365712000).

2551572684 is an abundant number, since it is smaller than the sum of its proper divisors (4179851316).

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

2551572684 is a wasteful number, since it uses less digits than its factorization.

2551572684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 1756 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 2551572684 is about 50513.0941835877. The cubic root of 2551572684 is about 1366.4780126137.

The spelling of 2551572684 in words is "two billion, five hundred fifty-one million, five hundred seventy-two thousand, six hundred eighty-four".