138140328777 has 16 divisors (see below), whose sum is σ = 207860057280. Its totient is φ = 80834465600.

The previous prime is 138140328749. The next prime is 138140328779. The reversal of 138140328777 is 777823041831.

It is a cyclic number.

It is not a de Polignac number, because 138140328777 - 2⁷ = 138140328649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138140328779) 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, 72172674 + ... + 72174587.

It is an arithmetic number, because the mean of its divisors is an integer number (12991253580).

Almost surely, 2^138140328777 is an apocalyptic number.

It is an amenable number.

138140328777 is a deficient number, since it is larger than the sum of its proper divisors (69719728503).

138140328777 is a wasteful number, since it uses less digits than its factorization.

138140328777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144347304.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 138140328777 in words is "one hundred thirty-eight billion, one hundred forty million, three hundred twenty-eight thousand, seven hundred seventy-seven".