961565786 has 16 divisors (see below), whose sum is σ = 1451225160. Its totient is φ = 477833280.

The previous prime is 961565783. The next prime is 961565791. The reversal of 961565786 is 687565169.

It can be written as a sum of positive squares in 4 ways, for example, as 394221025 + 567344761 = 19855^2 + 23819^2 .

It is not an unprimeable number, because it can be changed into a prime (961565783) 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 7 ways as a sum of consecutive naturals, for example, 246080 + ... + 249956.

Almost surely, 2^961565786 is an apocalyptic number.

961565786 is a deficient number, since it is larger than the sum of its proper divisors (489659374).

961565786 is a wasteful number, since it uses less digits than its factorization.

961565786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609.

The product of its digits is 2721600, while the sum is 53.

The square root of 961565786 is about 31009.1242378755. The cubic root of 961565786 is about 987.0208662326.

The spelling of 961565786 in words is "nine hundred sixty-one million, five hundred sixty-five thousand, seven hundred eighty-six".