864820922924 has 24 divisors (see below), whose sum is σ = 1745806728960. Its totient is φ = 367173634896.

The previous prime is 864820922921. The next prime is 864820922929. The reversal of 864820922924 is 429229028468.

It is a self number, because there is not a number n which added to its sum of digits gives 864820922924.

It is not an unprimeable number, because it can be changed into a prime (864820922921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144326264 + ... + 144332255.

It is an arithmetic number, because the mean of its divisors is an integer number (72741947040).

Almost surely, 2^864820922924 is an apocalyptic number.

It is an amenable number.

864820922924 is an abundant number, since it is smaller than the sum of its proper divisors (880985806036).

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

864820922924 is a wasteful number, since it uses less digits than its factorization.

864820922924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288658637 (or 288658635 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 864820922924 in words is "eight hundred sixty-four billion, eight hundred twenty million, nine hundred twenty-two thousand, nine hundred twenty-four".