33536999981 has 2 divisors, whose sum is σ = 33536999982. Its totient is φ = 33536999980.

The previous prime is 33536999971. The next prime is 33537000017. The reversal of 33536999981 is 18999963533.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21324760900 + 12212239081 = 146030^2 + 110509^2 .

It is a cyclic number.

It is not a de Polignac number, because 33536999981 - 2¹⁸ = 33536737837 is a prime.

It is a super-2 number, since 2×33536999981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33536999941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16768499990 + 16768499991.

It is an arithmetic number, because the mean of its divisors is an integer number (16768499991).

Almost surely, 2^33536999981 is an apocalyptic number.

It is an amenable number.

33536999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33536999981 is an equidigital number, since it uses as much as digits as its factorization.

33536999981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42515280, while the sum is 65.

The spelling of 33536999981 in words is "thirty-three billion, five hundred thirty-six million, nine hundred ninety-nine thousand, nine hundred eighty-one".