76338713818721 has 4 divisors (see below), whose sum is σ = 76584175921344. Its totient is φ = 76093251716100.

The previous prime is 76338713818709. The next prime is 76338713818739. The reversal of 76338713818721 is 12781831783367.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 76338713818721 - 2¹⁰ = 76338713817697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76338713818751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122731050845 + ... + 122731051466.

It is an arithmetic number, because the mean of its divisors is an integer number (19146043980336).

Almost surely, 2^{76338713818721} is an apocalyptic number.

It is an amenable number.

76338713818721 is a deficient number, since it is larger than the sum of its proper divisors (245462102623).

76338713818721 is a wasteful number, since it uses less digits than its factorization.

76338713818721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245462102622.

The product of its digits is 56899584, while the sum is 65.

The spelling of 76338713818721 in words is "seventy-six trillion, three hundred thirty-eight billion, seven hundred thirteen million, eight hundred eighteen thousand, seven hundred twenty-one".