2564540320264 has 16 divisors (see below), whose sum is σ = 5178398723820. Its totient is φ = 1183633993920.

The previous prime is 2564540320217. The next prime is 2564540320297. The reversal of 2564540320264 is 4620230454652.

It can be written as a sum of positive squares in 2 ways, for example, as 2542653484900 + 21886835364 = 1594570^2 + 147942^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2564540320264.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12329520667 + ... + 12329520874.

Almost surely, 2^{2564540320264} is an apocalyptic number.

It is an amenable number.

2564540320264 is an abundant number, since it is smaller than the sum of its proper divisors (2613858403556).

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

2564540320264 is a wasteful number, since it uses less digits than its factorization.

2564540320264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24659041560 (or 24659041556 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 43.

The spelling of 2564540320264 in words is "two trillion, five hundred sixty-four billion, five hundred forty million, three hundred twenty thousand, two hundred sixty-four".