138423551613 has 4 divisors (see below), whose sum is σ = 184564735488. Its totient is φ = 92282367740.

The previous prime is 138423551599. The next prime is 138423551639. The reversal of 138423551613 is 316155324831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138423551613 - 2⁶ = 138423551549 is a prime.

It is a super-2 number, since 2×138423551613² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138423551683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23070591933 + ... + 23070591938.

It is an arithmetic number, because the mean of its divisors is an integer number (46141183872).

Almost surely, 2^138423551613 is an apocalyptic number.

It is an amenable number.

138423551613 is a deficient number, since it is larger than the sum of its proper divisors (46141183875).

138423551613 is an equidigital number, since it uses as much as digits as its factorization.

138423551613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46141183874.

The product of its digits is 259200, while the sum is 42.

The spelling of 138423551613 in words is "one hundred thirty-eight billion, four hundred twenty-three million, five hundred fifty-one thousand, six hundred thirteen".