33478289645 has 18 divisors (see below), whose sum is σ = 41070489066. Its totient is φ = 26197732320.

The previous prime is 33478289587. The next prime is 33478289657. The reversal of 33478289645 is 54698287433.

It can be written as a sum of positive squares in 3 ways, for example, as 5811622756 + 27666666889 = 76234^2 + 166333^2 .

It is not a de Polignac number, because 33478289645 - 2¹⁴ = 33478273261 is a prime.

It is a super-3 number, since 3×33478289645³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19228475 + ... + 19230215.

It is an arithmetic number, because the mean of its divisors is an integer number (2281693837).

Almost surely, 2^33478289645 is an apocalyptic number.

It is an amenable number.

33478289645 is a deficient number, since it is larger than the sum of its proper divisors (7592199421).

33478289645 is an frugal number, since it uses more digits than its factorization.

33478289645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581 (or 1793 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 59.

The spelling of 33478289645 in words is "thirty-three billion, four hundred seventy-eight million, two hundred eighty-nine thousand, six hundred forty-five".