138378104385 has 32 divisors (see below), whose sum is σ = 221802841728. Its totient is φ = 73669155840.

The previous prime is 138378104369. The next prime is 138378104411. The reversal of 138378104385 is 583401873831.

It is not a de Polignac number, because 138378104385 - 2⁴ = 138378104369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29308825 + ... + 29313545.

It is an arithmetic number, because the mean of its divisors is an integer number (6931338804).

Almost surely, 2^138378104385 is an apocalyptic number.

138378104385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138378104385 is a deficient number, since it is larger than the sum of its proper divisors (83424737343).

138378104385 is a wasteful number, since it uses less digits than its factorization.

138378104385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7825.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 138378104385 in words is "one hundred thirty-eight billion, three hundred seventy-eight million, one hundred four thousand, three hundred eighty-five".