8191712794 has 8 divisors (see below), whose sum is σ = 12307486068. Its totient is φ = 4089217440.

The previous prime is 8191712779. The next prime is 8191712873. The reversal of 8191712794 is 4972171918.

It can be written as a sum of positive squares in 2 ways, for example, as 7787180025 + 404532769 = 88245^2 + 20113^2 .

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

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, 3317937 + ... + 3320404.

Almost surely, 2^8191712794 is an apocalyptic number.

8191712794 is a deficient number, since it is larger than the sum of its proper divisors (4115773274).

8191712794 is a wasteful number, since it uses less digits than its factorization.

8191712794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6638960.

The product of its digits is 254016, while the sum is 49.

The square root of 8191712794 is about 90508.0813739856. The cubic root of 8191712794 is about 2015.8501211655.

The spelling of 8191712794 in words is "eight billion, one hundred ninety-one million, seven hundred twelve thousand, seven hundred ninety-four".