138195023398 has 8 divisors (see below), whose sum is σ = 207394205040. Its totient is φ = 69063621720.

The previous prime is 138195023389. The next prime is 138195023401. The reversal of 138195023398 is 893320591831.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16939893 + ... + 16948048.

It is an arithmetic number, because the mean of its divisors is an integer number (25924275630).

Almost surely, 2^138195023398 is an apocalyptic number.

138195023398 is a deficient number, since it is larger than the sum of its proper divisors (69199181642).

138195023398 is a wasteful number, since it uses less digits than its factorization.

138195023398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33889982.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 138195023398 in words is "one hundred thirty-eight billion, one hundred ninety-five million, twenty-three thousand, three hundred ninety-eight".