2564644306 has 32 divisors (see below), whose sum is σ = 4420931328. Its totient is φ = 1093055040.

The previous prime is 2564644283. The next prime is 2564644331. The reversal of 2564644306 is 6034464652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3451371 + ... + 3452113.

It is an arithmetic number, because the mean of its divisors is an integer number (138154104).

Almost surely, 2^2564644306 is an apocalyptic number.

2564644306 is a deficient number, since it is larger than the sum of its proper divisors (1856287022).

2564644306 is a wasteful number, since it uses less digits than its factorization.

2564644306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786.

The product of its (nonzero) digits is 414720, while the sum is 40.

The square root of 2564644306 is about 50642.3173442922. The cubic root of 2564644306 is about 1368.8075129507.

The spelling of 2564644306 in words is "two billion, five hundred sixty-four million, six hundred forty-four thousand, three hundred six".