5663216123665 has 8 divisors (see below), whose sum is σ = 6795924031080. Its totient is φ = 4530529777152.

The previous prime is 5663216123659. The next prime is 5663216123683.

5663216123665 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 3661237326096 + 2001978797569 = 1913436^2 + 1414913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5663216123665 - 2²⁷ = 5663081905937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4806624 + ... + 5867713.

It is an arithmetic number, because the mean of its divisors is an integer number (849490503885).

Almost surely, 2^{5663216123665} is an apocalyptic number.

It is an amenable number.

5663216123665 is a deficient number, since it is larger than the sum of its proper divisors (1132707907415).

5663216123665 is a wasteful number, since it uses less digits than its factorization.

5663216123665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10780451.

The product of its digits is 6998400, while the sum is 52.

The spelling of 5663216123665 in words is "five trillion, six hundred sixty-three billion, two hundred sixteen million, one hundred twenty-three thousand, six hundred sixty-five".