2557002645 has 48 divisors (see below), whose sum is σ = 4596359040. Its totient is φ = 1313440128.

The previous prime is 2557002629. The next prime is 2557002659. The reversal of 2557002645 is 5462007552.

2557002645 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 0 + 0 + 2 + 645 = 666.

It is not a de Polignac number, because 2557002645 - 2⁴ = 2557002629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 575904 + ... + 580326.

It is an arithmetic number, because the mean of its divisors is an integer number (95757480).

Almost surely, 2^2557002645 is an apocalyptic number.

It is an amenable number.

2557002645 is a deficient number, since it is larger than the sum of its proper divisors (2039356395).

2557002645 is a wasteful number, since it uses less digits than its factorization.

2557002645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4906 (or 4903 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 2557002645 is about 50566.8136726055. The cubic root of 2557002645 is about 1367.4466524870.

The spelling of 2557002645 in words is "two billion, five hundred fifty-seven million, two thousand, six hundred forty-five".