2564860357 has 4 divisors (see below), whose sum is σ = 2590255116. Its totient is φ = 2539465600.

The previous prime is 2564860349. The next prime is 2564860379. The reversal of 2564860357 is 7530684652.

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 2533511556 + 31348801 = 50334^2 + 5599^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564860357 - 2³ = 2564860349 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 (2564810357) 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, 12697228 + ... + 12697429.

It is an arithmetic number, because the mean of its divisors is an integer number (647563779).

Almost surely, 2^2564860357 is an apocalyptic number.

It is an amenable number.

2564860357 is a deficient number, since it is larger than the sum of its proper divisors (25394759).

2564860357 is a wasteful number, since it uses less digits than its factorization.

2564860357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25394758.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The square root of 2564860357 is about 50644.4504067326. The cubic root of 2564860357 is about 1368.8459489406.

The spelling of 2564860357 in words is "two billion, five hundred sixty-four million, eight hundred sixty thousand, three hundred fifty-seven".