656212545203 has 4 divisors (see below), whose sum is σ = 656216575560. Its totient is φ = 656208514848.

The previous prime is 656212545179. The next prime is 656212545217. The reversal of 656212545203 is 302545212656.

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 656212545203 - 2⁶ = 656212545139 is a prime.

It is a super-2 number, since 2×656212545203² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656212545253) 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 3 ways as a sum of consecutive naturals, for example, 1760198 + ... + 2100171.

It is an arithmetic number, because the mean of its divisors is an integer number (164054143890).

Almost surely, 2^656212545203 is an apocalyptic number.

656212545203 is a deficient number, since it is larger than the sum of its proper divisors (4030357).

656212545203 is a wasteful number, since it uses less digits than its factorization.

656212545203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030356.

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 656212545203 its reverse (302545212656), we get a palindrome (958757757859).

The spelling of 656212545203 in words is "six hundred fifty-six billion, two hundred twelve million, five hundred forty-five thousand, two hundred three".