864649671 has 16 divisors (see below), whose sum is σ = 1174407936. Its totient is φ = 565762176.

The previous prime is 864649651. The next prime is 864649679. The reversal of 864649671 is 176946468.

It is not a de Polignac number, because 864649671 - 2¹⁰ = 864648647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864649679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22536 + ... + 47298.

It is an arithmetic number, because the mean of its divisors is an integer number (73400496).

Almost surely, 2^864649671 is an apocalyptic number.

864649671 is a deficient number, since it is larger than the sum of its proper divisors (309758265).

864649671 is a wasteful number, since it uses less digits than its factorization.

864649671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24982.

The product of its digits is 1741824, while the sum is 51.

The square root of 864649671 is about 29404.9259648787. The cubic root of 864649671 is about 952.6792955443.

The spelling of 864649671 in words is "eight hundred sixty-four million, six hundred forty-nine thousand, six hundred seventy-one".