33428444821649 has 2 divisors, whose sum is σ = 33428444821650. Its totient is φ = 33428444821648.

The previous prime is 33428444821643. The next prime is 33428444821727. The reversal of 33428444821649 is 94612844482433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33395315361424 + 33129460225 = 5778868^2 + 182015^2 .

It is a cyclic number.

It is not a de Polignac number, because 33428444821649 - 2⁴⁰ = 32328933193873 is a prime.

It is a super-2 number, since 2×33428444821649² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33428444821591 and 33428444821600.

It is not a weakly prime, because it can be changed into another prime (33428444821643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16714222410824 + 16714222410825.

It is an arithmetic number, because the mean of its divisors is an integer number (16714222410825).

Almost surely, 2^{33428444821649} is an apocalyptic number.

It is an amenable number.

33428444821649 is a deficient number, since it is larger than the sum of its proper divisors (1).

33428444821649 is an equidigital number, since it uses as much as digits as its factorization.

33428444821649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127401984, while the sum is 62.

The spelling of 33428444821649 in words is "thirty-three trillion, four hundred twenty-eight billion, four hundred forty-four million, eight hundred twenty-one thousand, six hundred forty-nine".