56554989833 has 2 divisors, whose sum is σ = 56554989834. Its totient is φ = 56554989832.

The previous prime is 56554989817. The next prime is 56554989919. The reversal of 56554989833 is 33898945565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42686865664 + 13868124169 = 206608^2 + 117763^2 .

It is a cyclic number.

It is not a de Polignac number, because 56554989833 - 2⁴ = 56554989817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56554989833.

It is not a weakly prime, because it can be changed into another prime (56554929833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28277494916 + 28277494917.

It is an arithmetic number, because the mean of its divisors is an integer number (28277494917).

Almost surely, 2^56554989833 is an apocalyptic number.

It is an amenable number.

56554989833 is a deficient number, since it is larger than the sum of its proper divisors (1).

56554989833 is an equidigital number, since it uses as much as digits as its factorization.

56554989833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968000, while the sum is 65.

The spelling of 56554989833 in words is "fifty-six billion, five hundred fifty-four million, nine hundred eighty-nine thousand, eight hundred thirty-three".