8194520709 has 16 divisors (see below), whose sum is σ = 12142330240. Its totient is φ = 5461979040.

The previous prime is 8194520689. The next prime is 8194520767. The reversal of 8194520709 is 9070254918.

It is a de Polignac number, because none of the positive numbers 2^k-8194520709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8194520809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132984 + ... + 184590.

It is an arithmetic number, because the mean of its divisors is an integer number (758895640).

Almost surely, 2^8194520709 is an apocalyptic number.

It is an amenable number.

8194520709 is a deficient number, since it is larger than the sum of its proper divisors (3947809531).

8194520709 is a wasteful number, since it uses less digits than its factorization.

8194520709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57497 (or 57491 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 8194520709 is about 90523.5920023062. The cubic root of 8194520709 is about 2016.0804225818.

The spelling of 8194520709 in words is "eight billion, one hundred ninety-four million, five hundred twenty thousand, seven hundred nine".