2557644630 has 32 divisors (see below), whose sum is σ = 6158363904. Its totient is φ = 679814496.

The previous prime is 2557644623. The next prime is 2557644641. The reversal of 2557644630 is 364467552.

2557644630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129642 + ... + 148061.

It is an arithmetic number, because the mean of its divisors is an integer number (192448872).

Almost surely, 2^2557644630 is an apocalyptic number.

2557644630 is an abundant number, since it is smaller than the sum of its proper divisors (3600719274).

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

2557644630 is a wasteful number, since it uses less digits than its factorization.

2557644630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278020.

The product of its (nonzero) digits is 604800, while the sum is 42.

The square root of 2557644630 is about 50573.1611628144. The cubic root of 2557644630 is about 1367.5610842262.

The spelling of 2557644630 in words is "two billion, five hundred fifty-seven million, six hundred forty-four thousand, six hundred thirty".