195196517911 has 4 divisors (see below), whose sum is σ = 196439807992. Its totient is φ = 193953227832.

The previous prime is 195196517899. The next prime is 195196517933. The reversal of 195196517911 is 119715691591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119715691591 = 89413 ⋅1338907.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195196517911 is a prime.

It is the 441811-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195196517951) by changing a digit.

It is a nontrivial repunit in base 441810.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621644805 + ... + 621645118.

It is an arithmetic number, because the mean of its divisors is an integer number (49109951998).

Almost surely, 2^195196517911 is an apocalyptic number.

195196517911 is a deficient number, since it is larger than the sum of its proper divisors (1243290081).

195196517911 is a wasteful number, since it uses less digits than its factorization.

195196517911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243290080.

The product of its digits is 765450, while the sum is 55.

The spelling of 195196517911 in words is "one hundred ninety-five billion, one hundred ninety-six million, five hundred seventeen thousand, nine hundred eleven".