33978610681 has 8 divisors (see below), whose sum is σ = 34503580800. Its totient is φ = 33454165008.

The previous prime is 33978610637. The next prime is 33978610693. The reversal of 33978610681 is 18601687933.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33978610681 is a prime.

It is a super-2 number, since 2×33978610681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33978610781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480 + ... + 260686.

It is an arithmetic number, because the mean of its divisors is an integer number (4312947600).

Almost surely, 2^33978610681 is an apocalyptic number.

It is an amenable number.

33978610681 is a deficient number, since it is larger than the sum of its proper divisors (524970119).

33978610681 is a wasteful number, since it uses less digits than its factorization.

33978610681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262223.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 33978610681 in words is "thirty-three billion, nine hundred seventy-eight million, six hundred ten thousand, six hundred eighty-one".