195640365893 has 16 divisors (see below), whose sum is σ = 232539390336. Its totient is φ = 161106805440.

The previous prime is 195640365871. The next prime is 195640365911. The reversal of 195640365893 is 398563046591.

It is a happy number.

It is not a de Polignac number, because 195640365893 - 2⁶ = 195640365829 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 (195640385893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5309246 + ... + 5345967.

It is an arithmetic number, because the mean of its divisors is an integer number (14533711896).

Almost surely, 2^195640365893 is an apocalyptic number.

It is an amenable number.

195640365893 is a deficient number, since it is larger than the sum of its proper divisors (36899024443).

195640365893 is a wasteful number, since it uses less digits than its factorization.

195640365893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655324.

The product of its (nonzero) digits is 20995200, while the sum is 59.

The spelling of 195640365893 in words is "one hundred ninety-five billion, six hundred forty million, three hundred sixty-five thousand, eight hundred ninety-three".