56009081819 has 2 divisors, whose sum is σ = 56009081820. Its totient is φ = 56009081818.

The previous prime is 56009081803. The next prime is 56009081831. The reversal of 56009081819 is 91818090065.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56009081819 - 2⁴ = 56009081803 is a prime.

It is a super-2 number, since 2×56009081819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56009081899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28004540909 + 28004540910.

It is an arithmetic number, because the mean of its divisors is an integer number (28004540910).

Almost surely, 2^56009081819 is an apocalyptic number.

56009081819 is a deficient number, since it is larger than the sum of its proper divisors (1).

56009081819 is an equidigital number, since it uses as much as digits as its factorization.

56009081819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 47.

The spelling of 56009081819 in words is "fifty-six billion, nine million, eighty-one thousand, eight hundred nineteen".