8109195641 has 4 divisors (see below), whose sum is σ = 8109886800. Its totient is φ = 8108504484.

The previous prime is 8109195593. The next prime is 8109195659. The reversal of 8109195641 is 1465919018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1465919018 = 2 ⋅732959509.

It is a cyclic number.

It is not a de Polignac number, because 8109195641 - 2²² = 8105001337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8109195592 and 8109195601.

It is not an unprimeable number, because it can be changed into a prime (8109195541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327671 + ... + 351548.

It is an arithmetic number, because the mean of its divisors is an integer number (2027471700).

Almost surely, 2^8109195641 is an apocalyptic number.

It is an amenable number.

8109195641 is a deficient number, since it is larger than the sum of its proper divisors (691159).

8109195641 is a wasteful number, since it uses less digits than its factorization.

8109195641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691158.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 8109195641 is about 90051.0724033867. The cubic root of 8109195641 is about 2009.0585461773.

The spelling of 8109195641 in words is "eight billion, one hundred nine million, one hundred ninety-five thousand, six hundred forty-one".