32817563921 has 2 divisors, whose sum is σ = 32817563922. Its totient is φ = 32817563920.

The previous prime is 32817563903. The next prime is 32817564019. The reversal of 32817563921 is 12936571823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31692900625 + 1124663296 = 178025^2 + 33536^2 .

It is a cyclic number.

It is not a de Polignac number, because 32817563921 - 2²⁶ = 32750455057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (32817563221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16408781960 + 16408781961.

It is an arithmetic number, because the mean of its divisors is an integer number (16408781961).

Almost surely, 2^32817563921 is an apocalyptic number.

It is an amenable number.

32817563921 is a deficient number, since it is larger than the sum of its proper divisors (1).

32817563921 is an equidigital number, since it uses as much as digits as its factorization.

32817563921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The spelling of 32817563921 in words is "thirty-two billion, eight hundred seventeen million, five hundred sixty-three thousand, nine hundred twenty-one".