138672387398 has 24 divisors (see below), whose sum is σ = 216801195312. Its totient is φ = 66518760672.

The previous prime is 138672387361. The next prime is 138672387401. The reversal of 138672387398 is 893783276831.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1511 + ... + 526637.

It is an arithmetic number, because the mean of its divisors is an integer number (9033383138).

Almost surely, 2^138672387398 is an apocalyptic number.

138672387398 is a deficient number, since it is larger than the sum of its proper divisors (78128807914).

138672387398 is a wasteful number, since it uses less digits than its factorization.

138672387398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525344 (or 525315 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 65.

The spelling of 138672387398 in words is "one hundred thirty-eight billion, six hundred seventy-two million, three hundred eighty-seven thousand, three hundred ninety-eight".