195942249591 has 16 divisors (see below), whose sum is σ = 285104754048. Its totient is φ = 118712109600.

The previous prime is 195942249533. The next prime is 195942249623.

195942249591 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 195942249591 - 2⁹ = 195942249079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195942245591) 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, 921505 + ... + 1114026.

It is an arithmetic number, because the mean of its divisors is an integer number (17819047128).

Almost surely, 2^195942249591 is an apocalyptic number.

195942249591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

195942249591 is a deficient number, since it is larger than the sum of its proper divisors (89162504457).

195942249591 is a wasteful number, since it uses less digits than its factorization.

195942249591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038462.

The product of its digits is 10497600, while the sum is 60.

The spelling of 195942249591 in words is "one hundred ninety-five billion, nine hundred forty-two million, two hundred forty-nine thousand, five hundred ninety-one".