138696648518 has 16 divisors (see below), whose sum is σ = 217389070080. Its totient is φ = 66241921416.

The previous prime is 138696648481. The next prime is 138696648523. The reversal of 138696648518 is 815846696831.

138696648518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 2040248 + ... + 2107131.

It is an arithmetic number, because the mean of its divisors is an integer number (13586816880).

Almost surely, 2^138696648518 is an apocalyptic number.

138696648518 is a deficient number, since it is larger than the sum of its proper divisors (78692421562).

138696648518 is a wasteful number, since it uses less digits than its factorization.

138696648518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148131.

The product of its digits is 59719680, while the sum is 65.

The spelling of 138696648518 in words is "one hundred thirty-eight billion, six hundred ninety-six million, six hundred forty-eight thousand, five hundred eighteen".