16908185473 has 2 divisors, whose sum is σ = 16908185474. Its totient is φ = 16908185472.

The previous prime is 16908185453. The next prime is 16908185479. The reversal of 16908185473 is 37458180961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14910363664 + 1997821809 = 122108^2 + 44697^2 .

It is an emirp because it is prime and its reverse (37458180961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16908185473 - 2¹³ = 16908177281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16908185473.

It is not a weakly prime, because it can be changed into another prime (16908185479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8454092736 + 8454092737.

It is an arithmetic number, because the mean of its divisors is an integer number (8454092737).

Almost surely, 2^16908185473 is an apocalyptic number.

It is an amenable number.

16908185473 is a deficient number, since it is larger than the sum of its proper divisors (1).

16908185473 is an equidigital number, since it uses as much as digits as its factorization.

16908185473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 16908185473 in words is "sixteen billion, nine hundred eight million, one hundred eighty-five thousand, four hundred seventy-three".