16500173197 has 2 divisors, whose sum is σ = 16500173198. Its totient is φ = 16500173196.

The previous prime is 16500173189. The next prime is 16500173231. The reversal of 16500173197 is 79137100561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16498374916 + 1798281 = 128446^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 16500173197 - 2³ = 16500173189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16500173597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250086598 + 8250086599.

It is an arithmetic number, because the mean of its divisors is an integer number (8250086599).

Almost surely, 2^16500173197 is an apocalyptic number.

It is an amenable number.

16500173197 is a deficient number, since it is larger than the sum of its proper divisors (1).

16500173197 is an equidigital number, since it uses as much as digits as its factorization.

16500173197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 40.

The spelling of 16500173197 in words is "sixteen billion, five hundred million, one hundred seventy-three thousand, one hundred ninety-seven".