194536661 has 12 divisors (see below), whose sum is σ = 226410156. Its totient is φ = 166446720.

The previous prime is 194536651. The next prime is 194536673. The reversal of 194536661 is 166635491.

194536661 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 2 ways, for example, as 177156100 + 17380561 = 13310^2 + 4169^2 .

It is not a de Polignac number, because 194536661 - 2²² = 190342357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194536621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45230 + ... + 49343.

It is an arithmetic number, because the mean of its divisors is an integer number (18867513).

Almost surely, 2^194536661 is an apocalyptic number.

194536661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

194536661 is a deficient number, since it is larger than the sum of its proper divisors (31873495).

194536661 is a wasteful number, since it uses less digits than its factorization.

194536661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94612 (or 94601 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 194536661 is about 13947.6399795808. The cubic root of 194536661 is about 579.4293445888.

The spelling of 194536661 in words is "one hundred ninety-four million, five hundred thirty-six thousand, six hundred sixty-one".