656213216063 has 4 divisors (see below), whose sum is σ = 657080077080. Its totient is φ = 655346355048.

The previous prime is 656213216059. The next prime is 656213216077. The reversal of 656213216063 is 360612312656.

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 656213216063 - 2² = 656213216059 is a prime.

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 656213216063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656213216003) 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, 433429373 + ... + 433430886.

It is an arithmetic number, because the mean of its divisors is an integer number (164270019270).

Almost surely, 2^656213216063 is an apocalyptic number.

656213216063 is a deficient number, since it is larger than the sum of its proper divisors (866861017).

656213216063 is an equidigital number, since it uses as much as digits as its factorization.

656213216063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866861016.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 656213216063 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred sixteen thousand, sixty-three".