138424664327 has 4 divisors (see below), whose sum is σ = 138823583016. Its totient is φ = 138025745640.

The previous prime is 138424664311. The next prime is 138424664383. The reversal of 138424664327 is 723466424831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 723466424831 = 3251 ⋅222536581.

It is a cyclic number.

It is not a de Polignac number, because 138424664327 - 2⁴ = 138424664311 is a prime.

It is a super-2 number, since 2×138424664327² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138424664527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199458824 + ... + 199459517.

It is an arithmetic number, because the mean of its divisors is an integer number (34705895754).

Almost surely, 2^138424664327 is an apocalyptic number.

138424664327 is a deficient number, since it is larger than the sum of its proper divisors (398918689).

138424664327 is an equidigital number, since it uses as much as digits as its factorization.

138424664327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398918688.

The product of its digits is 4644864, while the sum is 50.

The spelling of 138424664327 in words is "one hundred thirty-eight billion, four hundred twenty-four million, six hundred sixty-four thousand, three hundred twenty-seven".