161217422105 has 8 divisors (see below), whose sum is σ = 201872250432. Its totient is φ = 123366375088.

The previous prime is 161217422089. The next prime is 161217422117. The reversal of 161217422105 is 501224712161.

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 161217422105 - 2⁴ = 161217422089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 700945199 + ... + 700945428.

It is an arithmetic number, because the mean of its divisors is an integer number (25234031304).

Almost surely, 2^161217422105 is an apocalyptic number.

It is an amenable number.

161217422105 is a deficient number, since it is larger than the sum of its proper divisors (40654828327).

161217422105 is a wasteful number, since it uses less digits than its factorization.

161217422105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401890655.

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 161217422105 in words is "one hundred sixty-one billion, two hundred seventeen million, four hundred twenty-two thousand, one hundred five".