194555961 has 6 divisors (see below), whose sum is σ = 281025290. Its totient is φ = 129703968.

The previous prime is 194555941. The next prime is 194555971. The reversal of 194555961 is 169555491.

It is a happy number.

194555961 is a `hidden beast` number, since 1 + 9 + 4 + 55 + 596 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 184443561 + 10112400 = 13581^2 + 3180^2 .

It is not a de Polignac number, because 194555961 - 2⁵ = 194555929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194555941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10808656 + ... + 10808673.

Almost surely, 2^194555961 is an apocalyptic number.

It is an amenable number.

194555961 is a deficient number, since it is larger than the sum of its proper divisors (86469329).

194555961 is a wasteful number, since it uses less digits than its factorization.

194555961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21617335 (or 21617332 counting only the distinct ones).

The product of its digits is 243000, while the sum is 45.

The square root of 194555961 is about 13948.3318357429. The cubic root of 194555961 is about 579.4485057013.

The spelling of 194555961 in words is "one hundred ninety-four million, five hundred fifty-five thousand, nine hundred sixty-one".