138131749009 has 16 divisors (see below), whose sum is σ = 143490816000. Its totient is φ = 132880487040.

The previous prime is 138131749003. The next prime is 138131749031. The reversal of 138131749009 is 900947131831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138131749009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138131749009.

It is not an unprimeable number, because it can be changed into a prime (138131749003) 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, 767367 + ... + 930115.

It is an arithmetic number, because the mean of its divisors is an integer number (8968176000).

Almost surely, 2^138131749009 is an apocalyptic number.

It is an amenable number.

138131749009 is a deficient number, since it is larger than the sum of its proper divisors (5359066991).

138131749009 is a wasteful number, since it uses less digits than its factorization.

138131749009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163080.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 138131749009 in words is "one hundred thirty-eight billion, one hundred thirty-one million, seven hundred forty-nine thousand, nine".