855688664 has 16 divisors (see below), whose sum is σ = 1606288320. Its totient is φ = 427345120.

The previous prime is 855688643. The next prime is 855688667. The reversal of 855688664 is 466886558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855688667) 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, 55067 + ... + 68874.

It is an arithmetic number, because the mean of its divisors is an integer number (100393020).

Almost surely, 2^855688664 is an apocalyptic number.

It is an amenable number.

855688664 is a deficient number, since it is larger than the sum of its proper divisors (750599656).

855688664 is a wasteful number, since it uses less digits than its factorization.

855688664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124810 (or 124806 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 56.

The square root of 855688664 is about 29252.1565700719. The cubic root of 855688664 is about 949.3767524266.

The spelling of 855688664 in words is "eight hundred fifty-five million, six hundred eighty-eight thousand, six hundred sixty-four".