138273444372831 has 8 divisors (see below), whose sum is σ = 184364987797680. Its totient is φ = 92182098598272.

The previous prime is 138273444372829. The next prime is 138273444372851.

It is a happy number.

138273444372831 is nontrivially palindromic in base 10.

138273444372831 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138273444372831 - 2¹ = 138273444372829 is a prime.

It is a super-2 number, since 2×138273444372831² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138273444372851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47772426 + ... + 50584103.

It is an arithmetic number, because the mean of its divisors is an integer number (23045623474710).

Almost surely, 2^{138273444372831} is an apocalyptic number.

138273444372831 is a deficient number, since it is larger than the sum of its proper divisors (46091543424849).

138273444372831 is an equidigital number, since it uses as much as digits as its factorization.

138273444372831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98825145.

The product of its digits is 65028096, while the sum is 60.

The spelling of 138273444372831 in words is "one hundred thirty-eight trillion, two hundred seventy-three billion, four hundred forty-four million, three hundred seventy-two thousand, eight hundred thirty-one".