12564745205 has 8 divisors (see below), whose sum is σ = 15164849592. Its totient is φ = 9993692608.

The previous prime is 12564745157. The next prime is 12564745231. The reversal of 12564745205 is 50254746521.

It can be written as a sum of positive squares in 4 ways, for example, as 6534135556 + 6030609649 = 80834^2 + 77657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12564745205 - 2⁸ = 12564744949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7261994 + ... + 7263723.

It is an arithmetic number, because the mean of its divisors is an integer number (1895606199).

Almost surely, 2^12564745205 is an apocalyptic number.

It is an amenable number.

12564745205 is a deficient number, since it is larger than the sum of its proper divisors (2600104387).

12564745205 is a wasteful number, since it uses less digits than its factorization.

12564745205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14525895.

The product of its (nonzero) digits is 336000, while the sum is 41.

The spelling of 12564745205 in words is "twelve billion, five hundred sixty-four million, seven hundred forty-five thousand, two hundred five".