195959561 has 8 divisors (see below), whose sum is σ = 237127680. Its totient is φ = 158084928.

The previous prime is 195959551. The next prime is 195959567. The reversal of 195959561 is 165959591.

It is a happy number.

195959561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195959561 - 2¹⁰ = 195958537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195959567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823241 + ... + 823478.

It is an arithmetic number, because the mean of its divisors is an integer number (29640960).

Almost surely, 2^195959561 is an apocalyptic number.

It is an amenable number.

195959561 is a deficient number, since it is larger than the sum of its proper divisors (41168119).

195959561 is a wasteful number, since it uses less digits than its factorization.

195959561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646743.

The product of its digits is 546750, while the sum is 50.

The square root of 195959561 is about 13998.5556754974. Note that the first 3 decimals coincide. The cubic root of 195959561 is about 580.8386213762.

The spelling of 195959561 in words is "one hundred ninety-five million, nine hundred fifty-nine thousand, five hundred sixty-one".