138081338381 has 8 divisors (see below), whose sum is σ = 158076085440. Its totient is φ = 118153801728.

The previous prime is 138081338347. The next prime is 138081338401. The reversal of 138081338381 is 183833180831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138081338381 is a prime.

It is a super-2 number, since 2×138081338381² (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 (138081338341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16798196 + ... + 16806413.

It is an arithmetic number, because the mean of its divisors is an integer number (19759510680).

Almost surely, 2^138081338381 is an apocalyptic number.

It is an amenable number.

138081338381 is a deficient number, since it is larger than the sum of its proper divisors (19994747059).

138081338381 is an equidigital number, since it uses as much as digits as its factorization.

138081338381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33605203.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 138081338381 in words is "one hundred thirty-eight billion, eighty-one million, three hundred thirty-eight thousand, three hundred eighty-one".