864664609824 has 36 divisors (see below), whose sum is σ = 2458889985006. Its totient is φ = 288221536512.

The previous prime is 864664609813. The next prime is 864664609847. The reversal of 864664609824 is 428906466468.

864664609824 is a `hidden beast` number, since 8 + 6 + 4 + 66 + 460 + 98 + 24 = 666.

It can be written as a sum of positive squares in only one way, i.e., 864654497424 + 10112400 = 929868^2 + 3180^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1501153549 + ... + 1501154124.

Almost surely, 2^864664609824 is an apocalyptic number.

It is an amenable number.

864664609824 is an abundant number, since it is smaller than the sum of its proper divisors (1594225375182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864664609824 is a wasteful number, since it uses less digits than its factorization.

864664609824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002307689 (or 3002307678 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 63.

The spelling of 864664609824 in words is "eight hundred sixty-four billion, six hundred sixty-four million, six hundred nine thousand, eight hundred twenty-four".