12456461564 has 24 divisors (see below), whose sum is σ = 21972934368. Its totient is φ = 6178639040.

The previous prime is 12456461543. The next prime is 12456461569. The reversal of 12456461564 is 46516465421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456461569) 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 7 ways as a sum of consecutive naturals, for example, 299489 + ... + 338535.

It is an arithmetic number, because the mean of its divisors is an integer number (915538932).

Almost surely, 2^12456461564 is an apocalyptic number.

It is an amenable number.

12456461564 is a deficient number, since it is larger than the sum of its proper divisors (9516472804).

12456461564 is a wasteful number, since it uses less digits than its factorization.

12456461564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39685 (or 39683 counting only the distinct ones).

The product of its digits is 691200, while the sum is 44.

The spelling of 12456461564 in words is "twelve billion, four hundred fifty-six million, four hundred sixty-one thousand, five hundred sixty-four".