823989916064 has 72 divisors (see below), whose sum is σ = 1895183962308. Its totient is φ = 351622763520.

The previous prime is 823989916039. The next prime is 823989916147. The reversal of 823989916064 is 460619989328.

It can be written as a sum of positive squares in 2 ways, for example, as 823265875600 + 724040464 = 907340^2 + 26908^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 762347 + ... + 1493034.

Almost surely, 2^823989916064 is an apocalyptic number.

It is an amenable number.

823989916064 is an abundant number, since it is smaller than the sum of its proper divisors (1071194046244).

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

823989916064 is a wasteful number, since it uses less digits than its factorization.

823989916064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255638 (or 2255623 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 65.

The spelling of 823989916064 in words is "eight hundred twenty-three billion, nine hundred eighty-nine million, nine hundred sixteen thousand, sixty-four".