216607016693 has 2 divisors, whose sum is σ = 216607016694. Its totient is φ = 216607016692.

The previous prime is 216607016623. The next prime is 216607016707. The reversal of 216607016693 is 396610706612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187976007844 + 28631008849 = 433562^2 + 169207^2 .

It is a cyclic number.

It is not a de Polignac number, because 216607016693 - 2²⁸ = 216338581237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216607016603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108303508346 + 108303508347.

It is an arithmetic number, because the mean of its divisors is an integer number (108303508347).

Almost surely, 2^216607016693 is an apocalyptic number.

It is an amenable number.

216607016693 is a deficient number, since it is larger than the sum of its proper divisors (1).

216607016693 is an equidigital number, since it uses as much as digits as its factorization.

216607016693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 216607016693 in words is "two hundred sixteen billion, six hundred seven million, sixteen thousand, six hundred ninety-three".