12145864564 has 24 divisors (see below), whose sum is σ = 22944216960. Its totient is φ = 5608583904.

The previous prime is 12145864561. The next prime is 12145864631. The reversal of 12145864564 is 46546854121.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145864561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2273544 + ... + 2278879.

It is an arithmetic number, because the mean of its divisors is an integer number (956009040).

Almost surely, 2^12145864564 is an apocalyptic number.

It is an amenable number.

12145864564 is a deficient number, since it is larger than the sum of its proper divisors (10798352396).

12145864564 is a wasteful number, since it uses less digits than its factorization.

12145864564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552479 (or 4552477 counting only the distinct ones).

The product of its digits is 921600, while the sum is 46.

The spelling of 12145864564 in words is "twelve billion, one hundred forty-five million, eight hundred sixty-four thousand, five hundred sixty-four".