656213216045 has 16 divisors (see below), whose sum is σ = 791642970432. Its totient is φ = 522185761920.

The previous prime is 656213216027. The next prime is 656213216059. The reversal of 656213216045 is 540612312656.

It is a happy number.

It is not a de Polignac number, because 656213216045 - 2⁶ = 656213215981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656213215993 and 656213216011.

It is a congruent number.

It is an unprimeable number.

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, 384785 + ... + 1208505.

It is an arithmetic number, because the mean of its divisors is an integer number (49477685652).

Almost surely, 2^656213216045 is an apocalyptic number.

It is an amenable number.

656213216045 is a deficient number, since it is larger than the sum of its proper divisors (135429754387).

656213216045 is a wasteful number, since it uses less digits than its factorization.

656213216045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824572.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 656213216045 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred sixteen thousand, forty-five".