33890682781 has 8 divisors (see below), whose sum is σ = 35384134464. Its totient is φ = 32398893120.

The previous prime is 33890682769. The next prime is 33890682857. The reversal of 33890682781 is 18728609833.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33890682781 - 2⁷ = 33890682653 is a prime.

It is a super-2 number, since 2×33890682781² (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 (33890682731) 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 7 ways as a sum of consecutive naturals, for example, 373735 + ... + 455476.

It is an arithmetic number, because the mean of its divisors is an integer number (4423016808).

Almost surely, 2^33890682781 is an apocalyptic number.

It is an amenable number.

33890682781 is a deficient number, since it is larger than the sum of its proper divisors (1493451683).

33890682781 is a wasteful number, since it uses less digits than its factorization.

33890682781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831011.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 33890682781 in words is "thirty-three billion, eight hundred ninety million, six hundred eighty-two thousand, seven hundred eighty-one".