8185194897 has 32 divisors (see below), whose sum is σ = 12448373760. Its totient is φ = 4735494720.

The previous prime is 8185194893. The next prime is 8185194907. The reversal of 8185194897 is 7984915818.

It is a happy number.

It is not a de Polignac number, because 8185194897 - 2² = 8185194893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8185194897.

It is not an unprimeable number, because it can be changed into a prime (8185194893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375738 + ... + 396924.

It is an arithmetic number, because the mean of its divisors is an integer number (389011680).

Almost surely, 2^8185194897 is an apocalyptic number.

It is an amenable number.

8185194897 is a deficient number, since it is larger than the sum of its proper divisors (4263178863).

8185194897 is a wasteful number, since it uses less digits than its factorization.

8185194897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21733.

The product of its digits is 5806080, while the sum is 60.

The square root of 8185194897 is about 90472.0669433389. The cubic root of 8185194897 is about 2015.3153290684.

The spelling of 8185194897 in words is "eight billion, one hundred eighty-five million, one hundred ninety-four thousand, eight hundred ninety-seven".