16603225817 has 2 divisors, whose sum is σ = 16603225818. Its totient is φ = 16603225816.

The previous prime is 16603225789. The next prime is 16603225843. The reversal of 16603225817 is 71852230661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12350099161 + 4253126656 = 111131^2 + 65216^2 .

It is a cyclic number.

It is not a de Polignac number, because 16603225817 - 2¹² = 16603221721 is a prime.

It is not a weakly prime, because it can be changed into another prime (16603225517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8301612908 + 8301612909.

It is an arithmetic number, because the mean of its divisors is an integer number (8301612909).

Almost surely, 2^16603225817 is an apocalyptic number.

It is an amenable number.

16603225817 is a deficient number, since it is larger than the sum of its proper divisors (1).

16603225817 is an equidigital number, since it uses as much as digits as its factorization.

16603225817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 16603225817 in words is "sixteen billion, six hundred three million, two hundred twenty-five thousand, eight hundred seventeen".