138138249999 has 16 divisors (see below), whose sum is σ = 190586390400. Its totient is φ = 88892834016.

The previous prime is 138138249983. The next prime is 138138250007. The reversal of 138138249999 is 999942831831.

It is not a de Polignac number, because 138138249999 - 2⁴ = 138138249983 is a prime.

It is a super-2 number, since 2×138138249999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138138249929) 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, 118692 + ... + 538854.

It is an arithmetic number, because the mean of its divisors is an integer number (11911649400).

Almost surely, 2^138138249999 is an apocalyptic number.

138138249999 is a deficient number, since it is larger than the sum of its proper divisors (52448140401).

138138249999 is a wasteful number, since it uses less digits than its factorization.

138138249999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423974.

The product of its digits is 30233088, while the sum is 66.

The spelling of 138138249999 in words is "one hundred thirty-eight billion, one hundred thirty-eight million, two hundred forty-nine thousand, nine hundred ninety-nine".