56553966913 has 2 divisors, whose sum is σ = 56553966914. Its totient is φ = 56553966912.

The previous prime is 56553966907. The next prime is 56553966947. The reversal of 56553966913 is 31966935565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41809207729 + 14744759184 = 204473^2 + 121428^2 .

It is a cyclic number.

It is not a de Polignac number, because 56553966913 - 2²⁹ = 56017096001 is a prime.

It is not a weakly prime, because it can be changed into another prime (56554966913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28276983456 + 28276983457.

It is an arithmetic number, because the mean of its divisors is an integer number (28276983457).

Almost surely, 2^56553966913 is an apocalyptic number.

It is an amenable number.

56553966913 is a deficient number, since it is larger than the sum of its proper divisors (1).

56553966913 is an equidigital number, since it uses as much as digits as its factorization.

56553966913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19683000, while the sum is 58.

The spelling of 56553966913 in words is "fifty-six billion, five hundred fifty-three million, nine hundred sixty-six thousand, nine hundred thirteen".