996561684023 has 2 divisors, whose sum is σ = 996561684024. Its totient is φ = 996561684022.

The previous prime is 996561683983. The next prime is 996561684073. The reversal of 996561684023 is 320486165699.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-996561684023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996561684073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498280842011 + 498280842012.

It is an arithmetic number, because the mean of its divisors is an integer number (498280842012).

Almost surely, 2^996561684023 is an apocalyptic number.

996561684023 is a deficient number, since it is larger than the sum of its proper divisors (1).

996561684023 is an equidigital number, since it uses as much as digits as its factorization.

996561684023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 996561684023 in words is "nine hundred ninety-six billion, five hundred sixty-one million, six hundred eighty-four thousand, twenty-three".