811713501089 has 2 divisors, whose sum is σ = 811713501090. Its totient is φ = 811713501088.

The previous prime is 811713501061. The next prime is 811713501091. The reversal of 811713501089 is 980105317118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810779587489 + 933913600 = 900433^2 + 30560^2 .

It is a cyclic number.

It is not a de Polignac number, because 811713501089 - 2³² = 807418533793 is a prime.

It is a Sophie Germain prime.

Together with 811713501091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (811713501019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405856750544 + 405856750545.

It is an arithmetic number, because the mean of its divisors is an integer number (405856750545).

Almost surely, 2^811713501089 is an apocalyptic number.

It is an amenable number.

811713501089 is a deficient number, since it is larger than the sum of its proper divisors (1).

811713501089 is an equidigital number, since it uses as much as digits as its factorization.

811713501089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 44.

The spelling of 811713501089 in words is "eight hundred eleven billion, seven hundred thirteen million, five hundred one thousand, eighty-nine".