79391515226 has 8 divisors (see below), whose sum is σ = 119097308340. Its totient is φ = 39692412448.

The previous prime is 79391515223. The next prime is 79391515249. The reversal of 79391515226 is 62251519397.

It is a Cunningham number, because it is equal to 281765²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 79391515225 + 1 = 281765^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (79391515223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642811 + ... + 1690446.

Almost surely, 2^79391515226 is an apocalyptic number.

79391515226 is a deficient number, since it is larger than the sum of its proper divisors (39705793114).

79391515226 is a wasteful number, since it uses less digits than its factorization.

79391515226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345168.

The product of its digits is 1020600, while the sum is 50.

The spelling of 79391515226 in words is "seventy-nine billion, three hundred ninety-one million, five hundred fifteen thousand, two hundred twenty-six".