12564550384 has 20 divisors (see below), whose sum is σ = 24353988120. Its totient is φ = 6279650240.

The previous prime is 12564550307. The next prime is 12564550399. The reversal of 12564550384 is 48305546521.

It is a self number, because there is not a number n which added to its sum of digits gives 12564550384.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124279 + ... + 201430.

It is an arithmetic number, because the mean of its divisors is an integer number (1217699406).

Almost surely, 2^12564550384 is an apocalyptic number.

It is an amenable number.

12564550384 is a deficient number, since it is larger than the sum of its proper divisors (11789437736).

12564550384 is a wasteful number, since it uses less digits than its factorization.

12564550384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328128 (or 328122 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 12564550384 in words is "twelve billion, five hundred sixty-four million, five hundred fifty thousand, three hundred eighty-four".