138187073766 has 64 divisors (see below), whose sum is σ = 348976677888. Its totient is φ = 35543912448.

The previous prime is 138187073737. The next prime is 138187073767. The reversal of 138187073766 is 667370781831.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138187073767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4190955 + ... + 4223798.

It is an arithmetic number, because the mean of its divisors is an integer number (5452760592).

Almost surely, 2^138187073766 is an apocalyptic number.

138187073766 is an abundant number, since it is smaller than the sum of its proper divisors (210789604122).

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

138187073766 is a wasteful number, since it uses less digits than its factorization.

138187073766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8414805.

The product of its (nonzero) digits is 7112448, while the sum is 57.

The spelling of 138187073766 in words is "one hundred thirty-eight billion, one hundred eighty-seven million, seventy-three thousand, seven hundred sixty-six".