2557759664 has 40 divisors (see below), whose sum is σ = 5035025952. Its totient is φ = 1258467840.

The previous prime is 2557759663. The next prime is 2557759709. The reversal of 2557759664 is 4669577552.

It is not an unprimeable number, because it can be changed into a prime (2557759663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694532 + ... + 698204.

Almost surely, 2^2557759664 is an apocalyptic number.

It is an amenable number.

2557759664 is a deficient number, since it is larger than the sum of its proper divisors (2477266288).

2557759664 is a wasteful number, since it uses less digits than its factorization.

2557759664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365 (or 4359 counting only the distinct ones).

The product of its digits is 15876000, while the sum is 56.

The square root of 2557759664 is about 50574.2984528703. The cubic root of 2557759664 is about 1367.5815866397.

The spelling of 2557759664 in words is "two billion, five hundred fifty-seven million, seven hundred fifty-nine thousand, six hundred sixty-four".