138647827873 has 4 divisors (see below), whose sum is σ = 139498428208. Its totient is φ = 137797227540.

The previous prime is 138647827861. The next prime is 138647827883. The reversal of 138647827873 is 378728746831.

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 138647827873 - 2⁵ = 138647827841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138647827853) 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, 425299923 + ... + 425300248.

It is an arithmetic number, because the mean of its divisors is an integer number (34874607052).

Almost surely, 2^138647827873 is an apocalyptic number.

It is an amenable number.

138647827873 is a deficient number, since it is larger than the sum of its proper divisors (850600335).

138647827873 is an equidigital number, since it uses as much as digits as its factorization.

138647827873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850600334.

The product of its digits is 75866112, while the sum is 64.

The spelling of 138647827873 in words is "one hundred thirty-eight billion, six hundred forty-seven million, eight hundred twenty-seven thousand, eight hundred seventy-three".