208663123812 has 96 divisors (see below), whose sum is σ = 572206602240. Its totient is φ = 58346186880.

The previous prime is 208663123807. The next prime is 208663123847. The reversal of 208663123812 is 218321366802.

It is a super-2 number, since 2×208663123812² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5063989 + ... + 5105027.

It is an arithmetic number, because the mean of its divisors is an integer number (5960485440).

Almost surely, 2^208663123812 is an apocalyptic number.

208663123812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208663123812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286103301120).

208663123812 is an abundant number, since it is smaller than the sum of its proper divisors (363543478428).

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

208663123812 is a wasteful number, since it uses less digits than its factorization.

208663123812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44033 (or 44031 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 208663123812 in words is "two hundred eight billion, six hundred sixty-three million, one hundred twenty-three thousand, eight hundred twelve".