16508963473 has 2 divisors, whose sum is σ = 16508963474. Its totient is φ = 16508963472.

The previous prime is 16508963453. The next prime is 16508963491. The reversal of 16508963473 is 37436980561.

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., 14833534849 + 1675428624 = 121793^2 + 40932^2 .

It is a cyclic number.

It is not a de Polignac number, because 16508963473 - 2⁵ = 16508963441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16508963473.

It is not a weakly prime, because it can be changed into another prime (16508963423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8254481736 + 8254481737.

It is an arithmetic number, because the mean of its divisors is an integer number (8254481737).

Almost surely, 2^16508963473 is an apocalyptic number.

It is an amenable number.

16508963473 is a deficient number, since it is larger than the sum of its proper divisors (1).

16508963473 is an equidigital number, since it uses as much as digits as its factorization.

16508963473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 16508963473 in words is "sixteen billion, five hundred eight million, nine hundred sixty-three thousand, four hundred seventy-three".