656213215003 has 16 divisors (see below), whose sum is σ = 663918137344. Its totient is φ = 648550476000.

The previous prime is 656213214971. The next prime is 656213215067. The reversal of 656213215003 is 300512312656.

It is a cyclic number.

It is not a de Polignac number, because 656213215003 - 2⁵ = 656213214971 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 656213215003.

It is not an unprimeable number, because it can be changed into a prime (656213215093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87760501 + ... + 87767977.

It is an arithmetic number, because the mean of its divisors is an integer number (41494883584).

Almost surely, 2^656213215003 is an apocalyptic number.

656213215003 is a deficient number, since it is larger than the sum of its proper divisors (7704922341).

656213215003 is a wasteful number, since it uses less digits than its factorization.

656213215003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10162.

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 656213215003 its reverse (300512312656), we get a palindrome (956725527659).

The spelling of 656213215003 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred fifteen thousand, three".