5656518815663 has 4 divisors (see below), whose sum is σ = 5902454416368. Its totient is φ = 5410583214960.

The previous prime is 5656518815641. The next prime is 5656518815699. The reversal of 5656518815663 is 3665188156565.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5656518815663 - 2⁶ = 5656518815599 is a prime.

It is a super-2 number, since 2×5656518815663² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5656518815663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5656518815863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122967800318 + ... + 122967800363.

It is an arithmetic number, because the mean of its divisors is an integer number (1475613604092).

Almost surely, 2^{5656518815663} is an apocalyptic number.

5656518815663 is a deficient number, since it is larger than the sum of its proper divisors (245935600705).

5656518815663 is a wasteful number, since it uses less digits than its factorization.

5656518815663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245935600704.

The product of its digits is 155520000, while the sum is 65.

The spelling of 5656518815663 in words is "five trillion, six hundred fifty-six billion, five hundred eighteen million, eight hundred fifteen thousand, six hundred sixty-three".