216811118612 has 48 divisors (see below), whose sum is σ = 427334337024. Its totient is φ = 95355792000.

The previous prime is 216811118611. The next prime is 216811118663.

216811118612 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×216811118612² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216811118611) 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 in 15 ways as a sum of consecutive naturals, for example, 13169378 + ... + 13185830.

It is an arithmetic number, because the mean of its divisors is an integer number (8902798688).

Almost surely, 2^216811118612 is an apocalyptic number.

216811118612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216811118612 is a deficient number, since it is larger than the sum of its proper divisors (210523218412).

216811118612 is a wasteful number, since it uses less digits than its factorization.

216811118612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26160 (or 26158 counting only the distinct ones).

The product of its digits is 9216, while the sum is 38.

The spelling of 216811118612 in words is "two hundred sixteen billion, eight hundred eleven million, one hundred eighteen thousand, six hundred twelve".