33038878721 has 2 divisors, whose sum is σ = 33038878722. Its totient is φ = 33038878720.

The previous prime is 33038878687. The next prime is 33038878757. The reversal of 33038878721 is 12787883033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19294599025 + 13744279696 = 138905^2 + 117236^2 .

It is an emirp because it is prime and its reverse (12787883033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33038878721 - 2¹⁸ = 33038616577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33038878721.

It is not a weakly prime, because it can be changed into another prime (33038874721) 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, 16519439360 + 16519439361.

It is an arithmetic number, because the mean of its divisors is an integer number (16519439361).

Almost surely, 2^33038878721 is an apocalyptic number.

It is an amenable number.

33038878721 is a deficient number, since it is larger than the sum of its proper divisors (1).

33038878721 is an equidigital number, since it uses as much as digits as its factorization.

33038878721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 33038878721 in words is "thirty-three billion, thirty-eight million, eight hundred seventy-eight thousand, seven hundred twenty-one".