32866309783921 has 2 divisors, whose sum is σ = 32866309783922. Its totient is φ = 32866309783920.

The previous prime is 32866309783913. The next prime is 32866309783963. The reversal of 32866309783921 is 12938790366823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17479832830321 + 15386476953600 = 4180889^2 + 3922560^2 .

It is an emirp because it is prime and its reverse (12938790366823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32866309783921 - 2³ = 32866309783913 is a prime.

It is a super-2 number, since 2×32866309783921² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32866309783981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16433154891960 + 16433154891961.

It is an arithmetic number, because the mean of its divisors is an integer number (16433154891961).

Almost surely, 2^{32866309783921} is an apocalyptic number.

It is an amenable number.

32866309783921 is a deficient number, since it is larger than the sum of its proper divisors (1).

32866309783921 is an equidigital number, since it uses as much as digits as its factorization.

32866309783921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141087744, while the sum is 67.

The spelling of 32866309783921 in words is "thirty-two trillion, eight hundred sixty-six billion, three hundred nine million, seven hundred eighty-three thousand, nine hundred twenty-one".