195956243845 has 24 divisors (see below), whose sum is σ = 237624687720. Its totient is φ = 155130474240.

The previous prime is 195956243803. The next prime is 195956243891. The reversal of 195956243845 is 548342659591.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 23791828516 + 172164415329 = 154246^2 + 414927^2 .

It is not a de Polignac number, because 195956243845 - 2²¹ = 195954146693 is a prime.

It is a super-2 number, since 2×195956243845² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63027151 + ... + 63030259.

It is an arithmetic number, because the mean of its divisors is an integer number (9901028655).

Almost surely, 2^195956243845 is an apocalyptic number.

It is an amenable number.

195956243845 is a deficient number, since it is larger than the sum of its proper divisors (41668443875).

195956243845 is a wasteful number, since it uses less digits than its factorization.

195956243845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393 (or 4284 counting only the distinct ones).

The product of its digits is 46656000, while the sum is 61.

The spelling of 195956243845 in words is "one hundred ninety-five billion, nine hundred fifty-six million, two hundred forty-three thousand, eight hundred forty-five".