16605081329 has 2 divisors, whose sum is σ = 16605081330. Its totient is φ = 16605081328.

The previous prime is 16605081307. The next prime is 16605081443. The reversal of 16605081329 is 92318050661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16499916304 + 105165025 = 128452^2 + 10255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16605081329 is a prime.

It is not a weakly prime, because it can be changed into another prime (16605081629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8302540664 + 8302540665.

It is an arithmetic number, because the mean of its divisors is an integer number (8302540665).

Almost surely, 2^16605081329 is an apocalyptic number.

It is an amenable number.

16605081329 is a deficient number, since it is larger than the sum of its proper divisors (1).

16605081329 is an equidigital number, since it uses as much as digits as its factorization.

16605081329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 16605081329 in words is "sixteen billion, six hundred five million, eighty-one thousand, three hundred twenty-nine".