869404669217 has 24 divisors (see below), whose sum is σ = 1015292040192. Its totient is φ = 742303564800.

The previous prime is 869404669213. The next prime is 869404669249. The reversal of 869404669217 is 712966404968.

It is not a de Polignac number, because 869404669217 - 2² = 869404669213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 869404669217.

It is not an unprimeable number, because it can be changed into a prime (869404669213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13505168 + ... + 13569390.

It is an arithmetic number, because the mean of its divisors is an integer number (42303835008).

Almost surely, 2^869404669217 is an apocalyptic number.

It is an amenable number.

869404669217 is a deficient number, since it is larger than the sum of its proper divisors (145887370975).

869404669217 is a wasteful number, since it uses less digits than its factorization.

869404669217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65309 (or 65302 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 62.

The spelling of 869404669217 in words is "eight hundred sixty-nine billion, four hundred four million, six hundred sixty-nine thousand, two hundred seventeen".