138333371994 has 16 divisors (see below), whose sum is σ = 307407493440. Its totient is φ = 46111123980.

The previous prime is 138333371927. The next prime is 138333372007. The reversal of 138333371994 is 499173333831.

It is a happy number.

It is a super-2 number, since 2×138333371994² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 2561729111 = 138333371994 / (1 + 3 + 8 + 3 + 3 + 3 + 3 + 7 + 1 + 9 + 9 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 138333371994.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280864502 + ... + 1280864609.

It is an arithmetic number, because the mean of its divisors is an integer number (19212968340).

Almost surely, 2^138333371994 is an apocalyptic number.

138333371994 is an abundant number, since it is smaller than the sum of its proper divisors (169074121446).

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

138333371994 is a wasteful number, since it uses less digits than its factorization.

138333371994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561729122 (or 2561729116 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The spelling of 138333371994 in words is "one hundred thirty-eight billion, three hundred thirty-three million, three hundred seventy-one thousand, nine hundred ninety-four".