17164221945 has 32 divisors (see below), whose sum is σ = 29801084544. Its totient is φ = 8385561600.

The previous prime is 17164221941. The next prime is 17164221947. The reversal of 17164221945 is 54912246171.

It is not a de Polignac number, because 17164221945 - 2² = 17164221941 is a prime.

It is a super-2 number, since 2×17164221945² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 17164221897 and 17164221906.

It is not an unprimeable number, because it can be changed into a prime (17164221941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310416 + ... + 361505.

It is an arithmetic number, because the mean of its divisors is an integer number (931283892).

Almost surely, 2^17164221945 is an apocalyptic number.

17164221945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17164221945 is a deficient number, since it is larger than the sum of its proper divisors (12636862599).

17164221945 is a wasteful number, since it uses less digits than its factorization.

17164221945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672073.

The product of its digits is 120960, while the sum is 42.

The spelling of 17164221945 in words is "seventeen billion, one hundred sixty-four million, two hundred twenty-one thousand, nine hundred forty-five".