2564511171 has 4 divisors (see below), whose sum is σ = 3419348232. Its totient is φ = 1709674112.

The previous prime is 2564511161. The next prime is 2564511179. The reversal of 2564511171 is 1711154652.

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

It is a cyclic number.

It is not a de Polignac number, because 2564511171 - 2⁵ = 2564511139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2564511179) 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, 427418526 + ... + 427418531.

It is an arithmetic number, because the mean of its divisors is an integer number (854837058).

Almost surely, 2^2564511171 is an apocalyptic number.

2564511171 is a deficient number, since it is larger than the sum of its proper divisors (854837061).

2564511171 is an equidigital number, since it uses as much as digits as its factorization.

2564511171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854837060.

The product of its digits is 8400, while the sum is 33.

The square root of 2564511171 is about 50641.0028632925. The cubic root of 2564511171 is about 1368.7838268407.

The spelling of 2564511171 in words is "two billion, five hundred sixty-four million, five hundred eleven thousand, one hundred seventy-one".