56648684665 has 4 divisors (see below), whose sum is σ = 67978421604. Its totient is φ = 45318947728.

The previous prime is 56648684657. The next prime is 56648684747.

56648684665 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22005052281 + 34643632384 = 148341^2 + 186128^2 .

It is a cyclic number.

It is not a de Polignac number, because 56648684665 - 2³ = 56648684657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56648684597 and 56648684606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5664868462 + ... + 5664868471.

It is an arithmetic number, because the mean of its divisors is an integer number (16994605401).

Almost surely, 2^56648684665 is an apocalyptic number.

It is an amenable number.

56648684665 is a deficient number, since it is larger than the sum of its proper divisors (11329736939).

56648684665 is a wasteful number, since it uses less digits than its factorization.

56648684665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11329736938.

The product of its digits is 199065600, while the sum is 64.

The spelling of 56648684665 in words is "fifty-six billion, six hundred forty-eight million, six hundred eighty-four thousand, six hundred sixty-five".