2564543451 has 4 divisors (see below), whose sum is σ = 3419391272. Its totient is φ = 1709695632.

The previous prime is 2564543431. The next prime is 2564543477. The reversal of 2564543451 is 1543454652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2564543451 - 2¹¹ = 2564541403 is a prime.

It is a super-2 number, since 2×2564543451² = 13153766224133978802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564543431) 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, 427423906 + ... + 427423911.

It is an arithmetic number, because the mean of its divisors is an integer number (854847818).

Almost surely, 2^2564543451 is an apocalyptic number.

2564543451 is a deficient number, since it is larger than the sum of its proper divisors (854847821).

2564543451 is an equidigital number, since it uses as much as digits as its factorization.

2564543451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854847820.

The product of its digits is 288000, while the sum is 39.

The square root of 2564543451 is about 50641.3215763570. The cubic root of 2564543451 is about 1368.7895698658.

It can be divided in two parts, 25645 and 43451, that added together give a palindrome (69096).

The spelling of 2564543451 in words is "two billion, five hundred sixty-four million, five hundred forty-three thousand, four hundred fifty-one".