13564493043712 has 144 divisors (see below), whose sum is σ = 29394230949720. Its totient is φ = 6255196766208.

The previous prime is 13564493043677. The next prime is 13564493043727. The reversal of 13564493043712 is 21734039446531.

It is a super-2 number, since 2×13564493043712² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 13564493043712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421202203 + ... + 421234405.

Almost surely, 2^{13564493043712} 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 13564493043712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14697115474860).

13564493043712 is an abundant number, since it is smaller than the sum of its proper divisors (15829737906008).

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

13564493043712 is a wasteful number, since it uses less digits than its factorization.

13564493043712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33468 (or 33435 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 13564493043712 in words is "thirteen trillion, five hundred sixty-four billion, four hundred ninety-three million, forty-three thousand, seven hundred twelve".