56009081818 has 4 divisors (see below), whose sum is σ = 84013622730. Its totient is φ = 28004540908.

The previous prime is 56009081803. The next prime is 56009081819. The reversal of 56009081818 is 81818090065.

56009081818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46395867609 + 9613214209 = 215397^2 + 98047^2 .

It is not an unprimeable number, because it can be changed into a prime (56009081819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14002270453 + ... + 14002270456.

Almost surely, 2^56009081818 is an apocalyptic number.

56009081818 is a deficient number, since it is larger than the sum of its proper divisors (28004540912).

56009081818 is a wasteful number, since it uses less digits than its factorization.

56009081818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28004540911.

The product of its (nonzero) digits is 138240, while the sum is 46.

The spelling of 56009081818 in words is "fifty-six billion, nine million, eighty-one thousand, eight hundred eighteen".