138255367723 has 4 divisors (see below), whose sum is σ = 150824037528. Its totient is φ = 125686697920.

The previous prime is 138255367697. The next prime is 138255367729. The reversal of 138255367723 is 327763552831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138255367723 is a prime.

It is a super-2 number, since 2×138255367723² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138255367729) 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 3 ways as a sum of consecutive naturals, for example, 6284334886 + ... + 6284334907.

It is an arithmetic number, because the mean of its divisors is an integer number (37706009382).

Almost surely, 2^138255367723 is an apocalyptic number.

138255367723 is a deficient number, since it is larger than the sum of its proper divisors (12568669805).

138255367723 is a wasteful number, since it uses less digits than its factorization.

138255367723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12568669804.

The product of its digits is 6350400, while the sum is 52.

The spelling of 138255367723 in words is "one hundred thirty-eight billion, two hundred fifty-five million, three hundred sixty-seven thousand, seven hundred twenty-three".