2564652557 has 4 divisors (see below), whose sum is σ = 2600774496. Its totient is φ = 2528530620.

The previous prime is 2564652553. The next prime is 2564652581. The reversal of 2564652557 is 7552564652.

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 2564652557 - 2² = 2564652553 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 (2564652553) 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, 18060863 + ... + 18061004.

It is an arithmetic number, because the mean of its divisors is an integer number (650193624).

Almost surely, 2^2564652557 is an apocalyptic number.

It is an amenable number.

2564652557 is a deficient number, since it is larger than the sum of its proper divisors (36121939).

2564652557 is an equidigital number, since it uses as much as digits as its factorization.

2564652557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36121938.

The product of its digits is 2520000, while the sum is 47.

The square root of 2564652557 is about 50642.3988077184. The cubic root of 2564652557 is about 1368.8089808630.

The spelling of 2564652557 in words is "two billion, five hundred sixty-four million, six hundred fifty-two thousand, five hundred fifty-seven".