216418509263 has 16 divisors (see below), whose sum is σ = 242657964960. Its totient is φ = 191281305600.

The previous prime is 216418509257. The next prime is 216418509289. The reversal of 216418509263 is 362905814612.

216418509263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216418509263 - 2⁸ = 216418509007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216418509253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336383 + ... + 738911.

It is an arithmetic number, because the mean of its divisors is an integer number (15166122810).

Almost surely, 2^216418509263 is an apocalyptic number.

216418509263 is a deficient number, since it is larger than the sum of its proper divisors (26239455697).

216418509263 is a wasteful number, since it uses less digits than its factorization.

216418509263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403898.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 216418509263 in words is "two hundred sixteen billion, four hundred eighteen million, five hundred nine thousand, two hundred sixty-three".