2116636223566 has 4 divisors (see below), whose sum is σ = 3174954335352. Its totient is φ = 1058318111782.

The previous prime is 2116636223561. The next prime is 2116636223599. The reversal of 2116636223566 is 6653226366112.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116636223561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 529159055890 + ... + 529159055893.

It is an arithmetic number, because the mean of its divisors is an integer number (793738583838).

Almost surely, 2^{2116636223566} is an apocalyptic number.

2116636223566 is a deficient number, since it is larger than the sum of its proper divisors (1058318111786).

2116636223566 is a wasteful number, since it uses less digits than its factorization.

2116636223566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058318111785.

The product of its digits is 2799360, while the sum is 49.

The spelling of 2116636223566 in words is "two trillion, one hundred sixteen billion, six hundred thirty-six million, two hundred twenty-three thousand, five hundred sixty-six".