33546239981 has 2 divisors, whose sum is σ = 33546239982. Its totient is φ = 33546239980.

The previous prime is 33546239977. The next prime is 33546240019. The reversal of 33546239981 is 18993264533.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32649237481 + 897002500 = 180691^2 + 29950^2 .

It is an emirp because it is prime and its reverse (18993264533) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33546239981 - 2² = 33546239977 is a prime.

It is a super-2 number, since 2×33546239981² (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 (33546239911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16773119990 + 16773119991.

It is an arithmetic number, because the mean of its divisors is an integer number (16773119991).

Almost surely, 2^33546239981 is an apocalyptic number.

It is an amenable number.

33546239981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33546239981 is an equidigital number, since it uses as much as digits as its factorization.

33546239981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 53.

The spelling of 33546239981 in words is "thirty-three billion, five hundred forty-six million, two hundred thirty-nine thousand, nine hundred eighty-one".