33117199961 has 4 divisors (see below), whose sum is σ = 33132113124. Its totient is φ = 33102286800.

The previous prime is 33117199931. The next prime is 33117199967. The reversal of 33117199961 is 16999171133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16999171133 = 7 ⋅2428453019.

It can be written as a sum of positive squares in 2 ways, for example, as 22400809561 + 10716390400 = 149669^2 + 103520^2 .

It is a cyclic number.

It is not a de Polignac number, because 33117199961 - 2⁶ = 33117199897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (33117199967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7453250 + ... + 7457691.

It is an arithmetic number, because the mean of its divisors is an integer number (8283028281).

Almost surely, 2^33117199961 is an apocalyptic number.

It is an amenable number.

33117199961 is a deficient number, since it is larger than the sum of its proper divisors (14913163).

33117199961 is a wasteful number, since it uses less digits than its factorization.

33117199961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14913162.

The product of its digits is 275562, while the sum is 50.

The spelling of 33117199961 in words is "thirty-three billion, one hundred seventeen million, one hundred ninety-nine thousand, nine hundred sixty-one".