8109191694 has 8 divisors (see below), whose sum is σ = 16218383400. Its totient is φ = 2703063896.

The previous prime is 8109191677. The next prime is 8109191711. The reversal of 8109191694 is 4961919018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8109191677) and next prime (8109191711).

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

8109191694 is an admirable number.

It is a congruent 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, 675765969 + ... + 675765980.

It is an arithmetic number, because the mean of its divisors is an integer number (2027297925).

Almost surely, 2^8109191694 is an apocalyptic number.

8109191694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8109191694 is a wasteful number, since it uses less digits than its factorization.

8109191694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351531954.

The product of its (nonzero) digits is 139968, while the sum is 48.

The square root of 8109191694 is about 90051.0504880426. The cubic root of 8109191694 is about 2009.0582202200.

The spelling of 8109191694 in words is "eight billion, one hundred nine million, one hundred ninety-one thousand, six hundred ninety-four".