138675511515 has 16 divisors (see below), whose sum is σ = 221892860448. Its totient is φ = 73956258816.

The previous prime is 138675511483. The next prime is 138675511529. The reversal of 138675511515 is 515115576831.

It is a happy number.

It is not a de Polignac number, because 138675511515 - 2⁵ = 138675511483 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46059 + ... + 528651.

It is an arithmetic number, because the mean of its divisors is an integer number (13868303778).

Almost surely, 2^138675511515 is an apocalyptic number.

138675511515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138675511515 is a deficient number, since it is larger than the sum of its proper divisors (83217348933).

138675511515 is a wasteful number, since it uses less digits than its factorization.

138675511515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501758.

The product of its digits is 630000, while the sum is 48.

The spelling of 138675511515 in words is "one hundred thirty-eight billion, six hundred seventy-five million, five hundred eleven thousand, five hundred fifteen".