10785681817 has 2 divisors, whose sum is σ = 10785681818. Its totient is φ = 10785681816.

The previous prime is 10785681793. The next prime is 10785681857. The reversal of 10785681817 is 71818658701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9916375561 + 869306256 = 99581^2 + 29484^2 .

It is an emirp because it is prime and its reverse (71818658701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10785681817 - 2¹⁹ = 10785157529 is a prime.

It is not a weakly prime, because it can be changed into another prime (10785681857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5392840908 + 5392840909.

It is an arithmetic number, because the mean of its divisors is an integer number (5392840909).

Almost surely, 2^10785681817 is an apocalyptic number.

It is an amenable number.

10785681817 is a deficient number, since it is larger than the sum of its proper divisors (1).

10785681817 is an equidigital number, since it uses as much as digits as its factorization.

10785681817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 52.

The spelling of 10785681817 in words is "ten billion, seven hundred eighty-five million, six hundred eighty-one thousand, eight hundred seventeen".