138375731375385 has 48 divisors (see below), whose sum is σ = 260203437277056. Its totient is φ = 62605338227712.

The previous prime is 138375731375369. The next prime is 138375731375419. The reversal of 138375731375385 is 583573137573831.

It is a happy number.

It is not a de Polignac number, because 138375731375385 - 2⁴ = 138375731375369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 970373557 + ... + 970516146.

It is an arithmetic number, because the mean of its divisors is an integer number (5420904943272).

Almost surely, 2^{138375731375385} is an apocalyptic number.

138375731375385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138375731375385 is a deficient number, since it is larger than the sum of its proper divisors (121827705901671).

138375731375385 is a wasteful number, since it uses less digits than its factorization.

138375731375385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940889822 (or 1940889815 counting only the distinct ones).

The product of its digits is 666792000, while the sum is 69.

The spelling of 138375731375385 in words is "one hundred thirty-eight trillion, three hundred seventy-five billion, seven hundred thirty-one million, three hundred seventy-five thousand, three hundred eighty-five".