33642344324621 has 2 divisors, whose sum is σ = 33642344324622. Its totient is φ = 33642344324620.

The previous prime is 33642344324609. The next prime is 33642344324663. The reversal of 33642344324621 is 12642344324633.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29413419415396 + 4228924909225 = 5423414^2 + 2056435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33642344324621 is a prime.

It is a super-2 number, since 2×33642344324621² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33642344327621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16821172162310 + 16821172162311.

It is an arithmetic number, because the mean of its divisors is an integer number (16821172162311).

Almost surely, 2^{33642344324621} is an apocalyptic number.

It is an amenable number.

33642344324621 is a deficient number, since it is larger than the sum of its proper divisors (1).

33642344324621 is an equidigital number, since it uses as much as digits as its factorization.

33642344324621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 47.

The spelling of 33642344324621 in words is "thirty-three trillion, six hundred forty-two billion, three hundred forty-four million, three hundred twenty-four thousand, six hundred twenty-one".