810475497857 has 2 divisors, whose sum is σ = 810475497858. Its totient is φ = 810475497856.

The previous prime is 810475497827. The next prime is 810475497859. The reversal of 810475497857 is 758794574018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 693982299136 + 116493198721 = 833056^2 + 341311^2 .

It is a cyclic number.

It is not a de Polignac number, because 810475497857 - 2¹⁰ = 810475496833 is a prime.

Together with 810475497859, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 810475497793 and 810475497802.

It is not a weakly prime, because it can be changed into another prime (810475497859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405237748928 + 405237748929.

It is an arithmetic number, because the mean of its divisors is an integer number (405237748929).

Almost surely, 2^810475497857 is an apocalyptic number.

It is an amenable number.

810475497857 is a deficient number, since it is larger than the sum of its proper divisors (1).

810475497857 is an equidigital number, since it uses as much as digits as its factorization.

810475497857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79027200, while the sum is 65.

The spelling of 810475497857 in words is "eight hundred ten billion, four hundred seventy-five million, four hundred ninety-seven thousand, eight hundred fifty-seven".