2557794618 has 16 divisors (see below), whose sum is σ = 5683988160. Its totient is φ = 852598188.

The previous prime is 2557794583. The next prime is 2557794641. The reversal of 2557794618 is 8164977552.

2557794618 is a `hidden beast` number, since 2 + 5 + 577 + 9 + 4 + 61 + 8 = 666.

2557794618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 47366567 = 2557794618 / (2 + 5 + 5 + 7 + 7 + 9 + 4 + 6 + 1 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23683230 + ... + 23683337.

It is an arithmetic number, because the mean of its divisors is an integer number (355249260).

Almost surely, 2^2557794618 is an apocalyptic number.

2557794618 is an abundant number, since it is smaller than the sum of its proper divisors (3126193542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2557794618 is a wasteful number, since it uses less digits than its factorization.

2557794618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47366578 (or 47366572 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The square root of 2557794618 is about 50574.6440224743. The cubic root of 2557794618 is about 1367.5878163401.

The spelling of 2557794618 in words is "two billion, five hundred fifty-seven million, seven hundred ninety-four thousand, six hundred eighteen".