2456542657 has 4 divisors (see below), whose sum is σ = 2513671600. Its totient is φ = 2399413716.

The previous prime is 2456542609. The next prime is 2456542663. The reversal of 2456542657 is 7562456542.

It is a happy number.

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 2456542657 - 2²⁷ = 2322324929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2456542607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28564407 + ... + 28564492.

It is an arithmetic number, because the mean of its divisors is an integer number (628417900).

Almost surely, 2^2456542657 is an apocalyptic number.

It is an amenable number.

2456542657 is a deficient number, since it is larger than the sum of its proper divisors (57128943).

2456542657 is an equidigital number, since it uses as much as digits as its factorization.

2456542657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57128942.

The product of its digits is 2016000, while the sum is 46.

The square root of 2456542657 is about 49563.5214346196. The cubic root of 2456542657 is about 1349.2987042508.

The spelling of 2456542657 in words is "two billion, four hundred fifty-six million, five hundred forty-two thousand, six hundred fifty-seven".