2564543412 has 18 divisors (see below), whose sum is σ = 6482595938. Its totient is φ = 854847792.

The previous prime is 2564543393. The next prime is 2564543413. The reversal of 2564543412 is 2143454652.

2564543412 is a `hidden beast` number, since 2 + 5 + 645 + 4 + 3 + 4 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1824485796 + 740057616 = 42714^2 + 27204^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 71237317 = 2564543412 / (2 + 5 + 6 + 4 + 5 + 4 + 3 + 4 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564543413) 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, 35618623 + ... + 35618694.

Almost surely, 2^2564543412 is an apocalyptic number.

It is an amenable number.

2564543412 is an abundant number, since it is smaller than the sum of its proper divisors (3918052526).

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

2564543412 is a wasteful number, since it uses less digits than its factorization.

2564543412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71237327 (or 71237322 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 2564543412 is about 50641.3211912959. The cubic root of 2564543412 is about 1368.7895629273.

The spelling of 2564543412 in words is "two billion, five hundred sixty-four million, five hundred forty-three thousand, four hundred twelve".