56861312089 has 2 divisors, whose sum is σ = 56861312090. Its totient is φ = 56861312088.

The previous prime is 56861312087. The next prime is 56861312093. The reversal of 56861312089 is 98021316865.

56861312089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33446191689 + 23415120400 = 182883^2 + 153020^2 .

It is a cyclic number.

It is not a de Polignac number, because 56861312089 - 2¹ = 56861312087 is a prime.

Together with 56861312087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56861312087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430656044 + 28430656045.

It is an arithmetic number, because the mean of its divisors is an integer number (28430656045).

Almost surely, 2^56861312089 is an apocalyptic number.

It is an amenable number.

56861312089 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861312089 is an equidigital number, since it uses as much as digits as its factorization.

56861312089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 56861312089 in words is "fifty-six billion, eight hundred sixty-one million, three hundred twelve thousand, eighty-nine".