138888894444145 has 16 divisors (see below), whose sum is σ = 166848366061440. Its totient is φ = 110989992507264.

The previous prime is 138888894444137. The next prime is 138888894444197. The reversal of 138888894444145 is 541444498888831.

It is a cyclic number.

It is not a de Polignac number, because 138888894444145 - 2³ = 138888894444137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219499594 + ... + 220131436.

It is an arithmetic number, because the mean of its divisors is an integer number (10428022878840).

Almost surely, 2^{138888894444145} is an apocalyptic number.

It is an amenable number.

138888894444145 is a deficient number, since it is larger than the sum of its proper divisors (27959471617295).

138888894444145 is an equidigital number, since it uses as much as digits as its factorization.

138888894444145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679704.

The product of its digits is 4529848320, while the sum is 79.

The spelling of 138888894444145 in words is "one hundred thirty-eight trillion, eight hundred eighty-eight billion, eight hundred ninety-four million, four hundred forty-four thousand, one hundred forty-five".