13555368512 has 224 divisors, whose sum is σ = 34145402880. Its totient is φ = 5208053760.

The previous prime is 13555368443. The next prime is 13555368517. The reversal of 13555368512 is 21586355531.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×13555368512² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13555368517) 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, 12401438 + ... + 12402530.

Almost surely, 2^13555368512 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 13555368512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17072701440).

13555368512 is an abundant number, since it is smaller than the sum of its proper divisors (20590034368).

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

13555368512 is a wasteful number, since it uses less digits than its factorization.

13555368512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1199 counting only the distinct ones).

The product of its digits is 540000, while the sum is 44.

The spelling of 13555368512 in words is "thirteen billion, five hundred fifty-five million, three hundred sixty-eight thousand, five hundred twelve".