13536863388 has 36 divisors (see below), whose sum is σ = 34228722528. Its totient is φ = 4510897920.

The previous prime is 13536863357. The next prime is 13536863393. The reversal of 13536863388 is 88336863531.

It is a happy number.

13536863388 is a `hidden beast` number, since 13 + 536 + 8 + 63 + 38 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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, 64108 + ... + 176588.

It is an arithmetic number, because the mean of its divisors is an integer number (950797848).

Almost surely, 2^13536863388 is an apocalyptic number.

13536863388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13536863388 is an abundant number, since it is smaller than the sum of its proper divisors (20691859140).

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

13536863388 is a wasteful number, since it uses less digits than its factorization.

13536863388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115834 (or 115829 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 13536863388 in words is "thirteen billion, five hundred thirty-six million, eight hundred sixty-three thousand, three hundred eighty-eight".