138128641161 has 16 divisors (see below), whose sum is σ = 210487833600. Its totient is φ = 78928366608.

The previous prime is 138128641159. The next prime is 138128641171. The reversal of 138128641161 is 161146821831.

It is not a de Polignac number, because 138128641161 - 2¹ = 138128641159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138128641171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879130 + ... + 1024268.

It is an arithmetic number, because the mean of its divisors is an integer number (13155489600).

Almost surely, 2^138128641161 is an apocalyptic number.

It is an amenable number.

138128641161 is a deficient number, since it is larger than the sum of its proper divisors (72359192439).

138128641161 is a wasteful number, since it uses less digits than its factorization.

138128641161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190468.

The product of its digits is 55296, while the sum is 42.

The spelling of 138128641161 in words is "one hundred thirty-eight billion, one hundred twenty-eight million, six hundred forty-one thousand, one hundred sixty-one".