163499212818 has 24 divisors (see below), whose sum is σ = 375086430108. Its totient is φ = 51293870592.

The previous prime is 163499212769. The next prime is 163499212829. The reversal of 163499212818 is 818212994361.

It is a happy number.

163499212818 is a `hidden beast` number, since 1 + 6 + 349 + 9 + 212 + 81 + 8 = 666.

163499212818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163052017209 + 447195609 = 403797^2 + 21147^2 .

It is a super-2 number, since 2×163499212818² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267155271 + ... + 267155882.

Almost surely, 2^163499212818 is an apocalyptic number.

163499212818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

163499212818 is an abundant number, since it is smaller than the sum of its proper divisors (211587217290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163499212818 is a wasteful number, since it uses less digits than its factorization.

163499212818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534311178 (or 534311175 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The spelling of 163499212818 in words is "one hundred sixty-three billion, four hundred ninety-nine million, two hundred twelve thousand, eight hundred eighteen".