2557842491 has 16 divisors (see below), whose sum is σ = 2854316160. Its totient is φ = 2277901440.

The previous prime is 2557842461. The next prime is 2557842499. The reversal of 2557842491 is 1942487552.

2557842491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2557842491 - 2¹⁰ = 2557841467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557842499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288596 + ... + 297326.

It is an arithmetic number, because the mean of its divisors is an integer number (178394760).

Almost surely, 2^2557842491 is an apocalyptic number.

2557842491 is a deficient number, since it is larger than the sum of its proper divisors (296473669).

2557842491 is a wasteful number, since it uses less digits than its factorization.

2557842491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9674.

The product of its digits is 806400, while the sum is 47.

The square root of 2557842491 is about 50575.1173107883. The cubic root of 2557842491 is about 1367.5963484459.

The spelling of 2557842491 in words is "two billion, five hundred fifty-seven million, eight hundred forty-two thousand, four hundred ninety-one".