656548211617 has 4 divisors (see below), whose sum is σ = 656600401600. Its totient is φ = 656496021636.

The previous prime is 656548211609. The next prime is 656548211659. The reversal of 656548211617 is 716112845656.

656548211617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 656548211617 - 2³ = 656548211609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656548511617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26076117 + ... + 26101282.

It is an arithmetic number, because the mean of its divisors is an integer number (164150100400).

Almost surely, 2^656548211617 is an apocalyptic number.

It is an amenable number.

656548211617 is a deficient number, since it is larger than the sum of its proper divisors (52189983).

656548211617 is a wasteful number, since it uses less digits than its factorization.

656548211617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52189982.

The product of its digits is 2419200, while the sum is 52.

The spelling of 656548211617 in words is "six hundred fifty-six billion, five hundred forty-eight million, two hundred eleven thousand, six hundred seventeen".