33681845853 has 6 divisors (see below), whose sum is σ = 48651555134. Its totient is φ = 22454563896.

The previous prime is 33681845849. The next prime is 33681845861. The reversal of 33681845853 is 35854818633.

33681845853 is a `hidden beast` number, since 3 + 368 + 184 + 58 + 53 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16878686724 + 16803159129 = 129918^2 + 129627^2 .

It is not a de Polignac number, because 33681845853 - 2² = 33681845849 is a prime.

It is a super-2 number, since 2×33681845853² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33681845853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33681845653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1871213650 + ... + 1871213667.

Almost surely, 2^33681845853 is an apocalyptic number.

It is an amenable number.

33681845853 is a deficient number, since it is larger than the sum of its proper divisors (14969709281).

33681845853 is a wasteful number, since it uses less digits than its factorization.

33681845853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742427323 (or 3742427320 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 33681845853 in words is "thirty-three billion, six hundred eighty-one million, eight hundred forty-five thousand, eight hundred fifty-three".