216953657099 has 2 divisors, whose sum is σ = 216953657100. Its totient is φ = 216953657098.

The previous prime is 216953657033. The next prime is 216953657189. The reversal of 216953657099 is 990756359612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216953657099 is a prime.

It is not a weakly prime, because it can be changed into another prime (216953657699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108476828549 + 108476828550.

It is an arithmetic number, because the mean of its divisors is an integer number (108476828550).

Almost surely, 2^216953657099 is an apocalyptic number.

216953657099 is a deficient number, since it is larger than the sum of its proper divisors (1).

216953657099 is an equidigital number, since it uses as much as digits as its factorization.

216953657099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27556200, while the sum is 62.

The spelling of 216953657099 in words is "two hundred sixteen billion, nine hundred fifty-three million, six hundred fifty-seven thousand, ninety-nine".