16590783817 has 2 divisors, whose sum is σ = 16590783818. Its totient is φ = 16590783816.

The previous prime is 16590783799. The next prime is 16590783829. The reversal of 16590783817 is 71838709561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13741466176 + 2849317641 = 117224^2 + 53379^2 .

It is an emirp because it is prime and its reverse (71838709561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16590783817 - 2⁷ = 16590783689 is a prime.

It is not a weakly prime, because it can be changed into another prime (16590783877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8295391908 + 8295391909.

It is an arithmetic number, because the mean of its divisors is an integer number (8295391909).

Almost surely, 2^16590783817 is an apocalyptic number.

It is an amenable number.

16590783817 is a deficient number, since it is larger than the sum of its proper divisors (1).

16590783817 is an equidigital number, since it uses as much as digits as its factorization.

16590783817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 16590783817 in words is "sixteen billion, five hundred ninety million, seven hundred eighty-three thousand, eight hundred seventeen".