195057797817 has 16 divisors (see below), whose sum is σ = 269351626752. Its totient is φ = 125479188240.

The previous prime is 195057797807. The next prime is 195057797839. The reversal of 195057797817 is 718797750591.

It is not a de Polignac number, because 195057797817 - 2¹¹ = 195057795769 is a prime.

It is a super-3 number, since 3×195057797817³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (195057797807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9732163 + ... + 9752184.

It is an arithmetic number, because the mean of its divisors is an integer number (16834476672).

Almost surely, 2^195057797817 is an apocalyptic number.

It is an amenable number.

195057797817 is a deficient number, since it is larger than the sum of its proper divisors (74293828935).

195057797817 is a wasteful number, since it uses less digits than its factorization.

195057797817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19484468.

The product of its (nonzero) digits is 38896200, while the sum is 66.

The spelling of 195057797817 in words is "one hundred ninety-five billion, fifty-seven million, seven hundred ninety-seven thousand, eight hundred seventeen".