16355539217 has 2 divisors, whose sum is σ = 16355539218. Its totient is φ = 16355539216.

The previous prime is 16355539199. The next prime is 16355539241. The reversal of 16355539217 is 71293555361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15526156816 + 829382401 = 124604^2 + 28799^2 .

It is a cyclic number.

It is not a de Polignac number, because 16355539217 - 2¹⁰ = 16355538193 is a prime.

It is not a weakly prime, because it can be changed into another prime (16355539117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8177769608 + 8177769609.

It is an arithmetic number, because the mean of its divisors is an integer number (8177769609).

Almost surely, 2^16355539217 is an apocalyptic number.

It is an amenable number.

16355539217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16355539217 is an equidigital number, since it uses as much as digits as its factorization.

16355539217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 47.

The spelling of 16355539217 in words is "sixteen billion, three hundred fifty-five million, five hundred thirty-nine thousand, two hundred seventeen".