2557465853 has 4 divisors (see below), whose sum is σ = 2567417340. Its totient is φ = 2547514368.

The previous prime is 2557465843. The next prime is 2557465871. The reversal of 2557465853 is 3585647552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2434632964 + 122832889 = 49342^2 + 11083^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557465853 - 2⁴ = 2557465837 is a prime.

It is a super-2 number, since 2×2557465853² = 13081263178522035218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557465843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4975358 + ... + 4975871.

It is an arithmetic number, because the mean of its divisors is an integer number (641854335).

Almost surely, 2^2557465853 is an apocalyptic number.

It is an amenable number.

2557465853 is a deficient number, since it is larger than the sum of its proper divisors (9951487).

2557465853 is an equidigital number, since it uses as much as digits as its factorization.

2557465853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9951486.

The product of its digits is 5040000, while the sum is 50.

The square root of 2557465853 is about 50571.3936232728. The cubic root of 2557465853 is about 1367.5292197311.

The spelling of 2557465853 in words is "two billion, five hundred fifty-seven million, four hundred sixty-five thousand, eight hundred fifty-three".