656563423103 has 32 divisors (see below), whose sum is σ = 794978426880. Its totient is φ = 529695072000.

The previous prime is 656563423099. The next prime is 656563423157. The reversal of 656563423103 is 301324365656.

It is not a de Polignac number, because 656563423103 - 2² = 656563423099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656563423003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20840123 + ... + 20871603.

It is an arithmetic number, because the mean of its divisors is an integer number (24843075840).

Almost surely, 2^656563423103 is an apocalyptic number.

656563423103 is a deficient number, since it is larger than the sum of its proper divisors (138415003777).

656563423103 is a wasteful number, since it uses less digits than its factorization.

656563423103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32519.

The product of its (nonzero) digits is 1166400, while the sum is 44.

Adding to 656563423103 its reverse (301324365656), we get a palindrome (957887788759).

The spelling of 656563423103 in words is "six hundred fifty-six billion, five hundred sixty-three million, four hundred twenty-three thousand, one hundred three".