56814475309 has 2 divisors, whose sum is σ = 56814475310. Its totient is φ = 56814475308.

The previous prime is 56814475231. The next prime is 56814475327. The reversal of 56814475309 is 90357441865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56452334409 + 362140900 = 237597^2 + 19030^2 .

It is a cyclic number.

It is not a de Polignac number, because 56814475309 - 2¹³ = 56814467117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56814475709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28407237654 + 28407237655.

It is an arithmetic number, because the mean of its divisors is an integer number (28407237655).

Almost surely, 2^56814475309 is an apocalyptic number.

It is an amenable number.

56814475309 is a deficient number, since it is larger than the sum of its proper divisors (1).

56814475309 is an equidigital number, since it uses as much as digits as its factorization.

56814475309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 56814475309 in words is "fifty-six billion, eight hundred fourteen million, four hundred seventy-five thousand, three hundred nine".