2564745171 has 16 divisors (see below), whose sum is σ = 3624593184. Its totient is φ = 1607573504.

The previous prime is 2564745149. The next prime is 2564745187. The reversal of 2564745171 is 1715474652.

It is a cyclic number.

It is not a de Polignac number, because 2564745171 - 2¹¹ = 2564743123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2564745371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24091 + ... + 75563.

It is an arithmetic number, because the mean of its divisors is an integer number (226537074).

Almost surely, 2^2564745171 is an apocalyptic number.

2564745171 is a deficient number, since it is larger than the sum of its proper divisors (1059848013).

2564745171 is a wasteful number, since it uses less digits than its factorization.

2564745171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52470.

The product of its digits is 235200, while the sum is 42.

The square root of 2564745171 is about 50643.3131913780. The cubic root of 2564745171 is about 1368.8254573442.

The spelling of 2564745171 in words is "two billion, five hundred sixty-four million, seven hundred forty-five thousand, one hundred seventy-one".