33478386817 has 4 divisors (see below), whose sum is σ = 33480450900. Its totient is φ = 33476322736.

The previous prime is 33478386811. The next prime is 33478386827. The reversal of 33478386817 is 71868387433.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2179115761 + 31299271056 = 46681^2 + 176916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33478386817 is a prime.

It is a super-2 number, since 2×33478386817² (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 (33478386811) 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 3 ways as a sum of consecutive naturals, for example, 1007518 + ... + 1040215.

It is an arithmetic number, because the mean of its divisors is an integer number (8370112725).

Almost surely, 2^33478386817 is an apocalyptic number.

It is an amenable number.

33478386817 is a deficient number, since it is larger than the sum of its proper divisors (2064083).

33478386817 is a wasteful number, since it uses less digits than its factorization.

33478386817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064082.

The product of its digits is 16257024, while the sum is 58.

The spelling of 33478386817 in words is "thirty-three billion, four hundred seventy-eight million, three hundred eighty-six thousand, eight hundred seventeen".