56423384209 has 2 divisors, whose sum is σ = 56423384210. Its totient is φ = 56423384208.

The previous prime is 56423384179. The next prime is 56423384279. The reversal of 56423384209 is 90248332465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56312713809 + 110670400 = 237303^2 + 10520^2 .

It is a cyclic number.

It is not a de Polignac number, because 56423384209 - 2¹¹ = 56423382161 is a prime.

It is a super-3 number, since 3×56423384209³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (56423384279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28211692104 + 28211692105.

It is an arithmetic number, because the mean of its divisors is an integer number (28211692105).

Almost surely, 2^56423384209 is an apocalyptic number.

It is an amenable number.

56423384209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56423384209 is an equidigital number, since it uses as much as digits as its factorization.

56423384209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 56423384209 in words is "fifty-six billion, four hundred twenty-three million, three hundred eighty-four thousand, two hundred nine".