33855472981 has 24 divisors (see below), whose sum is σ = 39053080800. Its totient is φ = 29026425600.

The previous prime is 33855472967. The next prime is 33855473027. The reversal of 33855472981 is 18927455833.

It is not a de Polignac number, because 33855472981 - 2⁵ = 33855472949 is a prime.

It is a super-2 number, since 2×33855472981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33855472901) 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 in 23 ways as a sum of consecutive naturals, for example, 12137535 + ... + 12140323.

It is an arithmetic number, because the mean of its divisors is an integer number (1627211700).

Almost surely, 2^33855472981 is an apocalyptic number.

It is an amenable number.

33855472981 is a deficient number, since it is larger than the sum of its proper divisors (5197607819).

33855472981 is a wasteful number, since it uses less digits than its factorization.

33855472981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301 (or 3060 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 55.

The spelling of 33855472981 in words is "thirty-three billion, eight hundred fifty-five million, four hundred seventy-two thousand, nine hundred eighty-one".