869599664 has 20 divisors (see below), whose sum is σ = 1724033256. Its totient is φ = 424687872.

The previous prime is 869599649. The next prime is 869599667. The reversal of 869599664 is 466995968.

It is a junction number, because it is equal to n+sod(n) for n = 869599597 and 869599606.

It is not an unprimeable number, because it can be changed into a prime (869599667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631289 + ... + 632664.

Almost surely, 2^869599664 is an apocalyptic number.

It is an amenable number.

869599664 is a deficient number, since it is larger than the sum of its proper divisors (854433592).

869599664 is a wasteful number, since it uses less digits than its factorization.

869599664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264004 (or 1263998 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 62.

The square root of 869599664 is about 29488.9752958627. The cubic root of 869599664 is about 954.4938205518.

The spelling of 869599664 in words is "eight hundred sixty-nine million, five hundred ninety-nine thousand, six hundred sixty-four".