16931272005 has 12 divisors (see below), whose sum is σ = 29347538220. Its totient is φ = 9030011712.

The previous prime is 16931271967. The next prime is 16931272019. The reversal of 16931272005 is 50027213961.

It can be written as a sum of positive squares in 2 ways, for example, as 7667979489 + 9263292516 = 87567^2 + 96246^2 .

It is not a de Polignac number, because 16931272005 - 2²⁷ = 16797054277 is a prime.

It is a Curzon number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 188125200 + ... + 188125289.

It is an arithmetic number, because the mean of its divisors is an integer number (2445628185).

Almost surely, 2^16931272005 is an apocalyptic number.

16931272005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16931272005 is a deficient number, since it is larger than the sum of its proper divisors (12416266215).

16931272005 is a wasteful number, since it uses less digits than its factorization.

16931272005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376250500 (or 376250497 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

Adding to 16931272005 its reverse (50027213961), we get a palindrome (66958485966).

The spelling of 16931272005 in words is "sixteen billion, nine hundred thirty-one million, two hundred seventy-two thousand, five".