33431917945 has 4 divisors (see below), whose sum is σ = 40118301540. Its totient is φ = 26745534352.

The previous prime is 33431917877. The next prime is 33431917963. The reversal of 33431917945 is 54971913433.

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 6169945401 + 27261972544 = 78549^2 + 165112^2 .

It is a cyclic number.

It is not a de Polignac number, because 33431917945 - 2⁹ = 33431917433 is a prime.

It is a super-2 number, since 2×33431917945² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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, 3343191790 + ... + 3343191799.

It is an arithmetic number, because the mean of its divisors is an integer number (10029575385).

Almost surely, 2^33431917945 is an apocalyptic number.

It is an amenable number.

33431917945 is a deficient number, since it is larger than the sum of its proper divisors (6686383595).

33431917945 is an equidigital number, since it uses as much as digits as its factorization.

33431917945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6686383594.

The product of its digits is 1224720, while the sum is 49.

The spelling of 33431917945 in words is "thirty-three billion, four hundred thirty-one million, nine hundred seventeen thousand, nine hundred forty-five".