33851283691681 has 2 divisors, whose sum is σ = 33851283691682. Its totient is φ = 33851283691680.

The previous prime is 33851283691661. The next prime is 33851283691697. The reversal of 33851283691681 is 18619638215833.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25575069552400 + 8276214139281 = 5057180^2 + 2876841^2 .

It is a cyclic number.

It is not a de Polignac number, because 33851283691681 - 2³¹ = 33849136208033 is a prime.

It is a super-2 number, since 2×33851283691681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33851283691661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16925641845840 + 16925641845841.

It is an arithmetic number, because the mean of its divisors is an integer number (16925641845841).

Almost surely, 2^{33851283691681} is an apocalyptic number.

It is an amenable number.

33851283691681 is a deficient number, since it is larger than the sum of its proper divisors (1).

33851283691681 is an equidigital number, since it uses as much as digits as its factorization.

33851283691681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 64.

The spelling of 33851283691681 in words is "thirty-three trillion, eight hundred fifty-one billion, two hundred eighty-three million, six hundred ninety-one thousand, six hundred eighty-one".