138205097115 has 64 divisors (see below), whose sum is σ = 241069944960. Its totient is φ = 67328409600.

The previous prime is 138205097099. The next prime is 138205097119. The reversal of 138205097115 is 511790502831.

It is not a de Polignac number, because 138205097115 - 2⁴ = 138205097099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138205097119) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3765171 + ... + 3801699.

It is an arithmetic number, because the mean of its divisors is an integer number (3766717890).

Almost surely, 2^138205097115 is an apocalyptic number.

138205097115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138205097115 is a deficient number, since it is larger than the sum of its proper divisors (102864847845).

138205097115 is a wasteful number, since it uses less digits than its factorization.

138205097115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36992.

The product of its (nonzero) digits is 75600, while the sum is 42.

Adding to 138205097115 its reverse (511790502831), we get a palindrome (649995599946).

The spelling of 138205097115 in words is "one hundred thirty-eight billion, two hundred five million, ninety-seven thousand, one hundred fifteen".