138504188766 has 16 divisors (see below), whose sum is σ = 281142831744. Its totient is φ = 45478987224.

The previous prime is 138504188747. The next prime is 138504188803. The reversal of 138504188766 is 667881405831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172268490 + ... + 172269293.

It is an arithmetic number, because the mean of its divisors is an integer number (17571426984).

Almost surely, 2^138504188766 is an apocalyptic number.

138504188766 is an abundant number, since it is smaller than the sum of its proper divisors (142638642978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138504188766 is a wasteful number, since it uses less digits than its factorization.

138504188766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344537855.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 138504188766 in words is "one hundred thirty-eight billion, five hundred four million, one hundred eighty-eight thousand, seven hundred sixty-six".