79381331915 has 4 divisors (see below), whose sum is σ = 95257598304. Its totient is φ = 63505065528.

The previous prime is 79381331899. The next prime is 79381331969. The reversal of 79381331915 is 51913318397.

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 79381331915 - 2⁴ = 79381331899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7938133187 + ... + 7938133196.

It is an arithmetic number, because the mean of its divisors is an integer number (23814399576).

Almost surely, 2^79381331915 is an apocalyptic number.

79381331915 is a deficient number, since it is larger than the sum of its proper divisors (15876266389).

79381331915 is a wasteful number, since it uses less digits than its factorization.

79381331915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15876266388.

The product of its digits is 612360, while the sum is 50.

The spelling of 79381331915 in words is "seventy-nine billion, three hundred eighty-one million, three hundred thirty-one thousand, nine hundred fifteen".