138106186771 has 16 divisors (see below), whose sum is σ = 159171505920. Its totient is φ = 117376981920.

The previous prime is 138106186753. The next prime is 138106186781. The reversal of 138106186771 is 177681601831.

It is a cyclic number.

It is not a de Polignac number, because 138106186771 - 2⁹ = 138106186259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138106186781) 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, 686436 + ... + 864526.

It is an arithmetic number, because the mean of its divisors is an integer number (9948219120).

Almost surely, 2^138106186771 is an apocalyptic number.

138106186771 is a deficient number, since it is larger than the sum of its proper divisors (21065319149).

138106186771 is a wasteful number, since it uses less digits than its factorization.

138106186771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179034.

The product of its (nonzero) digits is 338688, while the sum is 49.

The spelling of 138106186771 in words is "one hundred thirty-eight billion, one hundred six million, one hundred eighty-six thousand, seven hundred seventy-one".