2557298687 has 8 divisors (see below), whose sum is σ = 2575860096. Its totient is φ = 2538772632.

The previous prime is 2557298683. The next prime is 2557298693. The reversal of 2557298687 is 7868927552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2557298687 - 2² = 2557298683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557298683) 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, 146078 + ... + 162644.

It is an arithmetic number, because the mean of its divisors is an integer number (321982512).

Almost surely, 2^2557298687 is an apocalyptic number.

2557298687 is a deficient number, since it is larger than the sum of its proper divisors (18561409).

2557298687 is a wasteful number, since it uses less digits than its factorization.

2557298687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17677.

The product of its digits is 16934400, while the sum is 59.

The square root of 2557298687 is about 50569.7408239354. The cubic root of 2557298687 is about 1367.4994233905.

The spelling of 2557298687 in words is "two billion, five hundred fifty-seven million, two hundred ninety-eight thousand, six hundred eighty-seven".