16785534473 has 2 divisors, whose sum is σ = 16785534474. Its totient is φ = 16785534472.

The previous prime is 16785534383. The next prime is 16785534533. The reversal of 16785534473 is 37443558761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14886928144 + 1898606329 = 122012^2 + 43573^2 .

It is a cyclic number.

It is not a de Polignac number, because 16785534473 - 2⁸ = 16785534217 is a prime.

It is not a weakly prime, because it can be changed into another prime (16785534373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8392767236 + 8392767237.

It is an arithmetic number, because the mean of its divisors is an integer number (8392767237).

Almost surely, 2^16785534473 is an apocalyptic number.

It is an amenable number.

16785534473 is a deficient number, since it is larger than the sum of its proper divisors (1).

16785534473 is an equidigital number, since it uses as much as digits as its factorization.

16785534473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8467200, while the sum is 53.

The spelling of 16785534473 in words is "sixteen billion, seven hundred eighty-five million, five hundred thirty-four thousand, four hundred seventy-three".