56556323111 has 2 divisors, whose sum is σ = 56556323112. Its totient is φ = 56556323110.

The previous prime is 56556323051. The next prime is 56556323113. The reversal of 56556323111 is 11132365565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56556323111 - 2³⁴ = 39376453927 is a prime.

It is a super-3 number, since 3×56556323111³ (a number of 33 digits) contains 333 as substring.

Together with 56556323113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56556323113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278161555 + 28278161556.

It is an arithmetic number, because the mean of its divisors is an integer number (28278161556).

Almost surely, 2^56556323111 is an apocalyptic number.

56556323111 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556323111 is an equidigital number, since it uses as much as digits as its factorization.

56556323111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

Adding to 56556323111 its reverse (11132365565), we get a palindrome (67688688676).

The spelling of 56556323111 in words is "fifty-six billion, five hundred fifty-six million, three hundred twenty-three thousand, one hundred eleven".