138492579309 has 16 divisors (see below), whose sum is σ = 211634159232. Its totient is φ = 78914423808.

The previous prime is 138492579259. The next prime is 138492579317. The reversal of 138492579309 is 903975294831.

It is not a de Polignac number, because 138492579309 - 2⁹ = 138492578797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138492579359) 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, 9333784 + ... + 9348609.

It is an arithmetic number, because the mean of its divisors is an integer number (13227134952).

Almost surely, 2^138492579309 is an apocalyptic number.

It is an amenable number.

138492579309 is a deficient number, since it is larger than the sum of its proper divisors (73141579923).

138492579309 is a wasteful number, since it uses less digits than its factorization.

138492579309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18682756.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 138492579309 in words is "one hundred thirty-eight billion, four hundred ninety-two million, five hundred seventy-nine thousand, three hundred nine".