2557197655 has 16 divisors (see below), whose sum is σ = 3085023744. Its totient is φ = 2034859680.

The previous prime is 2557197649. The next prime is 2557197677. The reversal of 2557197655 is 5567917552.

It is a happy number.

It is not a de Polignac number, because 2557197655 - 2⁵ = 2557197623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270600 + ... + 1272610.

It is an arithmetic number, because the mean of its divisors is an integer number (192813984).

Almost surely, 2^2557197655 is an apocalyptic number.

2557197655 is a deficient number, since it is larger than the sum of its proper divisors (527826089).

2557197655 is a wasteful number, since it uses less digits than its factorization.

2557197655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246.

The product of its digits is 3307500, while the sum is 52.

The square root of 2557197655 is about 50568.7418767760. The cubic root of 2557197655 is about 1367.4814144107.

The spelling of 2557197655 in words is "two billion, five hundred fifty-seven million, one hundred ninety-seven thousand, six hundred fifty-five".