138156872469 has 32 divisors (see below), whose sum is σ = 230131307520. Its totient is φ = 71623574400.

The previous prime is 138156872449. The next prime is 138156872473. The reversal of 138156872469 is 964278651831.

It is a happy number.

It is not a de Polignac number, because 138156872469 - 2¹⁵ = 138156839701 is a prime.

It is a super-2 number, since 2×138156872469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138156872419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495624 + ... + 722465.

It is an arithmetic number, because the mean of its divisors is an integer number (7191603360).

Almost surely, 2^138156872469 is an apocalyptic number.

It is an amenable number.

138156872469 is a deficient number, since it is larger than the sum of its proper divisors (91974435051).

138156872469 is a wasteful number, since it uses less digits than its factorization.

138156872469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218601.

The product of its digits is 17418240, while the sum is 60.

The spelling of 138156872469 in words is "one hundred thirty-eight billion, one hundred fifty-six million, eight hundred seventy-two thousand, four hundred sixty-nine".