138760065891 has 12 divisors (see below), whose sum is σ = 205319772840. Its totient is φ = 90250449120.

The previous prime is 138760065881. The next prime is 138760065901. The reversal of 138760065891 is 198560067831.

138760065891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138760065881) and next prime (138760065901).

It is not a de Polignac number, because 138760065891 - 2¹⁴ = 138760049507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138760065811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188021401 + ... + 188022138.

It is an arithmetic number, because the mean of its divisors is an integer number (17109981070).

Almost surely, 2^138760065891 is an apocalyptic number.

138760065891 is a deficient number, since it is larger than the sum of its proper divisors (66559706949).

138760065891 is a wasteful number, since it uses less digits than its factorization.

138760065891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376043586 (or 376043583 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 138760065891 in words is "one hundred thirty-eight billion, seven hundred sixty million, sixty-five thousand, eight hundred ninety-one".