16623025217 has 2 divisors, whose sum is σ = 16623025218. Its totient is φ = 16623025216.

The previous prime is 16623025213. The next prime is 16623025229. The reversal of 16623025217 is 71252032661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16031611456 + 591413761 = 126616^2 + 24319^2 .

It is a cyclic number.

It is not a de Polignac number, because 16623025217 - 2² = 16623025213 is a prime.

It is not a weakly prime, because it can be changed into another prime (16623025213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8311512608 + 8311512609.

It is an arithmetic number, because the mean of its divisors is an integer number (8311512609).

Almost surely, 2^16623025217 is an apocalyptic number.

It is an amenable number.

16623025217 is a deficient number, since it is larger than the sum of its proper divisors (1).

16623025217 is an equidigital number, since it uses as much as digits as its factorization.

16623025217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

Adding to 16623025217 its reverse (71252032661), we get a palindrome (87875057878).

The spelling of 16623025217 in words is "sixteen billion, six hundred twenty-three million, twenty-five thousand, two hundred seventeen".