13589939538 has 64 divisors (see below), whose sum is σ = 34567614720. Its totient is φ = 3876823296.

The previous prime is 13589939537. The next prime is 13589939569. The reversal of 13589939538 is 83593998531.

13589939538 is a `hidden beast` number, since 1 + 3 + 5 + 8 + 9 + 93 + 9 + 538 = 666.

It is a super-3 number, since 3×13589939538³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (13589939537) 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, 219306 + ... + 274362.

It is an arithmetic number, because the mean of its divisors is an integer number (540118980).

Almost surely, 2^13589939538 is an apocalyptic number.

13589939538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13589939538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17283807360).

13589939538 is an abundant number, since it is smaller than the sum of its proper divisors (20977675182).

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

13589939538 is a wasteful number, since it uses less digits than its factorization.

13589939538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55728 (or 55722 counting only the distinct ones).

The product of its digits is 31492800, while the sum is 63.

The spelling of 13589939538 in words is "thirteen billion, five hundred eighty-nine million, nine hundred thirty-nine thousand, five hundred thirty-eight".