56012005123 has 2 divisors, whose sum is σ = 56012005124. Its totient is φ = 56012005122.

The previous prime is 56012005039. The next prime is 56012005157. The reversal of 56012005123 is 32150021065.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56012005123 is a prime.

It is not a weakly prime, because it can be changed into another prime (56012005183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28006002561 + 28006002562.

It is an arithmetic number, because the mean of its divisors is an integer number (28006002562).

Almost surely, 2^56012005123 is an apocalyptic number.

56012005123 is a deficient number, since it is larger than the sum of its proper divisors (1).

56012005123 is an equidigital number, since it uses as much as digits as its factorization.

56012005123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 56012005123 its reverse (32150021065), we get a palindrome (88162026188).

It can be divided in two parts, 5601 and 2005123, that added together give a square (2010724 = 1418²).

The spelling of 56012005123 in words is "fifty-six billion, twelve million, five thousand, one hundred twenty-three".