17980227961 has 8 divisors (see below), whose sum is σ = 18101725664. Its totient is φ = 17858867040.

The previous prime is 17980227931. The next prime is 17980227977. The reversal of 17980227961 is 16972208971.

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

It is a cyclic number.

It is not a de Polignac number, because 17980227961 - 2⁹ = 17980227449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17980227899 and 17980227908.

It is not an unprimeable number, because it can be changed into a prime (17980227931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236806 + ... + 303376.

It is an arithmetic number, because the mean of its divisors is an integer number (2262715708).

Almost surely, 2^17980227961 is an apocalyptic number.

It is an amenable number.

17980227961 is a deficient number, since it is larger than the sum of its proper divisors (121497703).

17980227961 is a wasteful number, since it uses less digits than its factorization.

17980227961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68391.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 17980227961 in words is "seventeen billion, nine hundred eighty million, two hundred twenty-seven thousand, nine hundred sixty-one".