195158850561 has 24 divisors (see below), whose sum is σ = 284982634664. Its totient is φ = 128683054080.

The previous prime is 195158850553. The next prime is 195158850571. The reversal of 195158850561 is 165058851591.

195158850561 is a `hidden beast` number, since 1 + 9 + 5 + 1 + 588 + 5 + 0 + 56 + 1 = 666.

195158850561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5286017025 + 189872833536 = 72705^2 + 435744^2 .

It is not a de Polignac number, because 195158850561 - 2³ = 195158850553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195158850498 and 195158850507.

It is not an unprimeable number, because it can be changed into a prime (195158850541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1324191 + ... + 1464171.

Almost surely, 2^195158850561 is an apocalyptic number.

It is an amenable number.

195158850561 is a deficient number, since it is larger than the sum of its proper divisors (89823784103).

195158850561 is a wasteful number, since it uses less digits than its factorization.

195158850561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141681 (or 141678 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 54.

The spelling of 195158850561 in words is "one hundred ninety-five billion, one hundred fifty-eight million, eight hundred fifty thousand, five hundred sixty-one".