864511216636 has 6 divisors (see below), whose sum is σ = 1512894629120. Its totient is φ = 432255608316.

The previous prime is 864511216619. The next prime is 864511216651. The reversal of 864511216636 is 636612115468.

864511216636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 864511216636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108063902076 + ... + 108063902083.

Almost surely, 2^864511216636 is an apocalyptic number.

It is an amenable number.

864511216636 is a deficient number, since it is larger than the sum of its proper divisors (648383412484).

864511216636 is a wasteful number, since it uses less digits than its factorization.

864511216636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216127804163 (or 216127804161 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The spelling of 864511216636 in words is "eight hundred sixty-four billion, five hundred eleven million, two hundred sixteen thousand, six hundred thirty-six".