190680561 has 30 divisors (see below), whose sum is σ = 300670722. Its totient is φ = 120411360.

The previous prime is 190680559. The next prime is 190680569. The reversal of 190680561 is 165086091.

190680561 is a `hidden beast` number, since 1 + 90 + 6 + 8 + 0 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 187142400 + 3538161 = 13680^2 + 1881^2 .

It is not a de Polignac number, because 190680561 - 2¹ = 190680559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190680569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 25981 + ... + 32501.

Almost surely, 2^190680561 is an apocalyptic number.

It is an amenable number.

190680561 is a deficient number, since it is larger than the sum of its proper divisors (109990161).

190680561 is an equidigital number, since it uses as much as digits as its factorization.

190680561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571 (or 6543 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 190680561 is about 13808.7132275241. The cubic root of 190680561 is about 575.5752891320.

The spelling of 190680561 in words is "one hundred ninety million, six hundred eighty thousand, five hundred sixty-one".