12135564512 has 48 divisors (see below), whose sum is σ = 25312159152. Its totient is φ = 5707499520.

The previous prime is 12135564509. The next prime is 12135564521. The reversal of 12135564512 is 21546553121.

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, 1088438 + ... + 1099530.

It is an arithmetic number, because the mean of its divisors is an integer number (527336649).

Almost surely, 2^12135564512 is an apocalyptic number.

It is an amenable number.

12135564512 is an abundant number, since it is smaller than the sum of its proper divisors (13176594640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12135564512 is a wasteful number, since it uses less digits than its factorization.

12135564512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13131 (or 13123 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The spelling of 12135564512 in words is "twelve billion, one hundred thirty-five million, five hundred sixty-four thousand, five hundred twelve".