138738715998 has 32 divisors (see below), whose sum is σ = 280110337920. Its totient is φ = 45807543840.

The previous prime is 138738715967. The next prime is 138738716009. The reversal of 138738715998 is 899517837831.

138738715998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138738715998² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7090108 + ... + 7109648.

It is an arithmetic number, because the mean of its divisors is an integer number (8753448060).

Almost surely, 2^138738715998 is an apocalyptic number.

138738715998 is an abundant number, since it is smaller than the sum of its proper divisors (141371621922).

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

138738715998 is a wasteful number, since it uses less digits than its factorization.

138738715998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30712.

The product of its digits is 91445760, while the sum is 69.

The spelling of 138738715998 in words is "one hundred thirty-eight billion, seven hundred thirty-eight million, seven hundred fifteen thousand, nine hundred ninety-eight".