56435853209 has 2 divisors, whose sum is σ = 56435853210. Its totient is φ = 56435853208.

The previous prime is 56435853191. The next prime is 56435853211. The reversal of 56435853209 is 90235853465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53814720400 + 2621132809 = 231980^2 + 51197^2 .

It is a cyclic number.

It is not a de Polignac number, because 56435853209 - 2²⁸ = 56167417753 is a prime.

Together with 56435853211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56435853239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28217926604 + 28217926605.

It is an arithmetic number, because the mean of its divisors is an integer number (28217926605).

Almost surely, 2^56435853209 is an apocalyptic number.

It is an amenable number.

56435853209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56435853209 is an equidigital number, since it uses as much as digits as its factorization.

56435853209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 56435853209 in words is "fifty-six billion, four hundred thirty-five million, eight hundred fifty-three thousand, two hundred nine".