138825538138 has 32 divisors (see below), whose sum is σ = 251431257600. Its totient is φ = 56222807424.

The previous prime is 138825538081. The next prime is 138825538151. The reversal of 138825538138 is 831835528831.

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, 3618523 + ... + 3656686.

It is an arithmetic number, because the mean of its divisors is an integer number (7857226800).

Almost surely, 2^138825538138 is an apocalyptic number.

138825538138 is a deficient number, since it is larger than the sum of its proper divisors (112605719462).

138825538138 is a wasteful number, since it uses less digits than its factorization.

138825538138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7275294.

The product of its digits is 5529600, while the sum is 55.

The spelling of 138825538138 in words is "one hundred thirty-eight billion, eight hundred twenty-five million, five hundred thirty-eight thousand, one hundred thirty-eight".