2564207812 has 6 divisors (see below), whose sum is σ = 4487363678. Its totient is φ = 1282103904.

The previous prime is 2564207783. The next prime is 2564207819. The reversal of 2564207812 is 2187024652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1843500096 + 720707716 = 42936^2 + 26846^2 .

It is not an unprimeable number, because it can be changed into a prime (2564207819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320525973 + ... + 320525980.

Almost surely, 2^2564207812 is an apocalyptic number.

It is an amenable number.

2564207812 is a deficient number, since it is larger than the sum of its proper divisors (1923155866).

2564207812 is a wasteful number, since it uses less digits than its factorization.

2564207812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641051957 (or 641051955 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 2564207812 is about 50638.0075832373. The cubic root of 2564207812 is about 1368.7298530371.

The spelling of 2564207812 in words is "two billion, five hundred sixty-four million, two hundred seven thousand, eight hundred twelve".