138513343747 has 4 divisors (see below), whose sum is σ = 138551494816. Its totient is φ = 138475192680.

The previous prime is 138513343723. The next prime is 138513343763. The reversal of 138513343747 is 747343315831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138513343747 - 2¹¹ = 138513341699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138513343747.

It is not an unprimeable number, because it can be changed into a prime (138513343447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19070088 + ... + 19077349.

It is an arithmetic number, because the mean of its divisors is an integer number (34637873704).

Almost surely, 2^138513343747 is an apocalyptic number.

138513343747 is a deficient number, since it is larger than the sum of its proper divisors (38151069).

138513343747 is an equidigital number, since it uses as much as digits as its factorization.

138513343747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38151068.

The product of its digits is 2540160, while the sum is 49.

The spelling of 138513343747 in words is "one hundred thirty-eight billion, five hundred thirteen million, three hundred forty-three thousand, seven hundred forty-seven".