138569318823 has 16 divisors (see below), whose sum is σ = 198987167456. Its totient is φ = 85266639360.

The previous prime is 138569318819. The next prime is 138569318917. The reversal of 138569318823 is 328813965831.

It is a happy number.

It is not a de Polignac number, because 138569318823 - 2² = 138569318819 is a prime.

It is a super-2 number, since 2×138569318823² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138569318123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379083 + ... + 648723.

It is an arithmetic number, because the mean of its divisors is an integer number (12436697966).

Almost surely, 2^138569318823 is an apocalyptic number.

138569318823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138569318823 is a deficient number, since it is larger than the sum of its proper divisors (60417848633).

138569318823 is a wasteful number, since it uses less digits than its factorization.

138569318823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282834.

The product of its digits is 7464960, while the sum is 57.

The spelling of 138569318823 in words is "one hundred thirty-eight billion, five hundred sixty-nine million, three hundred eighteen thousand, eight hundred twenty-three".