8140185194 has 8 divisors (see below), whose sum is σ = 12211358148. Its totient is φ = 4069732480.

The previous prime is 8140185169. The next prime is 8140185197. The reversal of 8140185194 is 4915810418.

It can be written as a sum of positive squares in 2 ways, for example, as 7536844225 + 603340969 = 86815^2 + 24563^2 .

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

It is a super-2 number, since 2×8140185194² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8140185197) 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, 150857 + ... + 197580.

Almost surely, 2^8140185194 is an apocalyptic number.

8140185194 is a deficient number, since it is larger than the sum of its proper divisors (4071172954).

8140185194 is a wasteful number, since it uses less digits than its factorization.

8140185194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360120.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 8140185194 is about 90222.9748678240. The cubic root of 8140185194 is about 2011.6145203943.

The spelling of 8140185194 in words is "eight billion, one hundred forty million, one hundred eighty-five thousand, one hundred ninety-four".