138656430799 has 8 divisors (see below), whose sum is σ = 138837546288. Its totient is φ = 138475370880.

The previous prime is 138656430797. The next prime is 138656430817. The reversal of 138656430799 is 997034656831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138656430799 - 2¹ = 138656430797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138656430797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7564804 + ... + 7583110.

It is an arithmetic number, because the mean of its divisors is an integer number (17354693286).

Almost surely, 2^138656430799 is an apocalyptic number.

138656430799 is a deficient number, since it is larger than the sum of its proper divisors (181115489).

138656430799 is an equidigital number, since it uses as much as digits as its factorization.

138656430799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27785.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 138656430799 in words is "one hundred thirty-eight billion, six hundred fifty-six million, four hundred thirty thousand, seven hundred ninety-nine".