869601606817 has 2 divisors, whose sum is σ = 869601606818. Its totient is φ = 869601606816.

The previous prime is 869601606791. The next prime is 869601606871. The reversal of 869601606817 is 718606106968.

It is a happy number.

869601606817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (869601606871) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859123218321 + 10478388496 = 926889^2 + 102364^2 .

It is a cyclic number.

It is not a de Polignac number, because 869601606817 - 2¹⁹ = 869601082529 is a prime.

It is not a weakly prime, because it can be changed into another prime (869601606877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434800803408 + 434800803409.

It is an arithmetic number, because the mean of its divisors is an integer number (434800803409).

Almost surely, 2^869601606817 is an apocalyptic number.

It is an amenable number.

869601606817 is a deficient number, since it is larger than the sum of its proper divisors (1).

869601606817 is an equidigital number, since it uses as much as digits as its factorization.

869601606817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 869601606817 in words is "eight hundred sixty-nine billion, six hundred one million, six hundred six thousand, eight hundred seventeen".