209636748112 has 80 divisors (see below), whose sum is σ = 446880540672. Its totient is φ = 94476533760.

The previous prime is 209636748091. The next prime is 209636748119. The reversal of 209636748112 is 211847636902.

It is a happy number.

209636748112 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209636748119) 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, 57956928 + ... + 57960544.

Almost surely, 2^209636748112 is an apocalyptic number.

209636748112 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 209636748112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223440270336).

209636748112 is an abundant number, since it is smaller than the sum of its proper divisors (237243792560).

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

209636748112 is a wasteful number, since it uses less digits than its factorization.

209636748112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356 (or 6350 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 209636748112 in words is "two hundred nine billion, six hundred thirty-six million, seven hundred forty-eight thousand, one hundred twelve".