12534404342512 has 160 divisors (see below), whose sum is σ = 27581978640384. Its totient is φ = 5477311411200.

The previous prime is 12534404342503. The next prime is 12534404342519. The reversal of 12534404342512 is 21524340443521.

It is a super-2 number, since 2×12534404342512² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12534404342519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1027656798 + ... + 1027668994.

Almost surely, 2^{12534404342512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12534404342512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13790989320192).

12534404342512 is an abundant number, since it is smaller than the sum of its proper divisors (15047574297872).

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

12534404342512 is a wasteful number, since it uses less digits than its factorization.

12534404342512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15687 (or 15681 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 12534404342512 in words is "twelve trillion, five hundred thirty-four billion, four hundred four million, three hundred forty-two thousand, five hundred twelve".