2557658117 has 4 divisors (see below), whose sum is σ = 2923037856. Its totient is φ = 2192278380.

The previous prime is 2557658099. The next prime is 2557658141. The reversal of 2557658117 is 7118567552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2557658117 - 2⁶ = 2557658053 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 (2557658717) 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, 182689859 + ... + 182689872.

It is an arithmetic number, because the mean of its divisors is an integer number (730759464).

Almost surely, 2^2557658117 is an apocalyptic number.

It is an amenable number.

2557658117 is a deficient number, since it is larger than the sum of its proper divisors (365379739).

2557658117 is an equidigital number, since it uses as much as digits as its factorization.

2557658117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365379738.

The product of its digits is 588000, while the sum is 47.

The square root of 2557658117 is about 50573.2945041155. The cubic root of 2557658117 is about 1367.5634880348.

The spelling of 2557658117 in words is "two billion, five hundred fifty-seven million, six hundred fifty-eight thousand, one hundred seventeen".