2564512722 has 12 divisors (see below), whose sum is σ = 5556444270. Its totient is φ = 854837568.

The previous prime is 2564512721. The next prime is 2564512759. The reversal of 2564512722 is 2272154652.

2564512722 is a `hidden beast` number, since 2 + 5 + 645 + 1 + 2 + 7 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1631271321 + 933241401 = 40389^2 + 30549^2 .

It is not an unprimeable number, because it can be changed into a prime (2564512721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71236447 + ... + 71236482.

Almost surely, 2^2564512722 is an apocalyptic number.

2564512722 is an abundant number, since it is smaller than the sum of its proper divisors (2991931548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2564512722 is a wasteful number, since it uses less digits than its factorization.

2564512722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142472937 (or 142472934 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 2564512722 is about 50641.0181769680. The cubic root of 2564512722 is about 1368.7841027845.

The spelling of 2564512722 in words is "two billion, five hundred sixty-four million, five hundred twelve thousand, seven hundred twenty-two".