12564198745 has 16 divisors (see below), whose sum is σ = 17265456000. Its totient is φ = 8598173184.

The previous prime is 12564198737. The next prime is 12564198749. The reversal of 12564198745 is 54789146521.

It is a cyclic number.

It is not a de Polignac number, because 12564198745 - 2³ = 12564198737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12564198692 and 12564198701.

It is not an unprimeable number, because it can be changed into a prime (12564198749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342232 + ... + 377161.

It is an arithmetic number, because the mean of its divisors is an integer number (1079091000).

Almost surely, 2^12564198745 is an apocalyptic number.

It is an amenable number.

12564198745 is a deficient number, since it is larger than the sum of its proper divisors (4701257255).

12564198745 is an equidigital number, since it uses as much as digits as its factorization.

12564198745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719904.

The product of its digits is 2419200, while the sum is 52.

The spelling of 12564198745 in words is "twelve billion, five hundred sixty-four million, one hundred ninety-eight thousand, seven hundred forty-five".