820361607986 has 16 divisors (see below), whose sum is σ = 1237967430336. Its totient is φ = 407706022416.

The previous prime is 820361607983. The next prime is 820361608057. The reversal of 820361607986 is 689706163028.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (820361607983) 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, 9934460 + ... + 10016696.

It is an arithmetic number, because the mean of its divisors is an integer number (77372964396).

Almost surely, 2^820361607986 is an apocalyptic number.

820361607986 is a deficient number, since it is larger than the sum of its proper divisors (417605822350).

820361607986 is a wasteful number, since it uses less digits than its factorization.

820361607986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112273.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 820361607986 in words is "eight hundred twenty billion, three hundred sixty-one million, six hundred seven thousand, nine hundred eighty-six".