823220659652 has 6 divisors (see below), whose sum is σ = 1440636154398. Its totient is φ = 411610329824.

The previous prime is 823220659643. The next prime is 823220659691. The reversal of 823220659652 is 256956022328.

It can be written as a sum of positive squares in only one way, i.e., 589848576256 + 233372083396 = 768016^2 + 483086^2 .

It is a super-2 number, since 2×823220659652² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 823220659652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102902582453 + ... + 102902582460.

It is an arithmetic number, because the mean of its divisors is an integer number (240106025733).

Almost surely, 2^823220659652 is an apocalyptic number.

It is an amenable number.

823220659652 is a deficient number, since it is larger than the sum of its proper divisors (617415494746).

823220659652 is a wasteful number, since it uses less digits than its factorization.

823220659652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205805164917 (or 205805164915 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 823220659652 in words is "eight hundred twenty-three billion, two hundred twenty million, six hundred fifty-nine thousand, six hundred fifty-two".