2564515073 has 4 divisors (see below), whose sum is σ = 2564676180. Its totient is φ = 2564353968.

The previous prime is 2564515067. The next prime is 2564515147. The reversal of 2564515073 is 3705154652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 363779329 + 2200735744 = 19073^2 + 46912^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564515073 - 2²² = 2560320769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2564515033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53690 + ... + 89507.

It is an arithmetic number, because the mean of its divisors is an integer number (641169045).

Almost surely, 2^2564515073 is an apocalyptic number.

It is an amenable number.

2564515073 is a deficient number, since it is larger than the sum of its proper divisors (161107).

2564515073 is a wasteful number, since it uses less digits than its factorization.

2564515073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161106.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 2564515073 is about 50641.0413893711. The cubic root of 2564515073 is about 1368.7845210590.

The spelling of 2564515073 in words is "two billion, five hundred sixty-four million, five hundred fifteen thousand, seventy-three".