11209185208 has 64 divisors (see below), whose sum is σ = 23013849600. Its totient is φ = 5087026560.

The previous prime is 11209185173. The next prime is 11209185257. The reversal of 11209185208 is 80258190211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3092085 + ... + 3095707.

It is an arithmetic number, because the mean of its divisors is an integer number (359591400).

Almost surely, 2^11209185208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11209185208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11506924800).

11209185208 is an abundant number, since it is smaller than the sum of its proper divisors (11804664392).

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

11209185208 is a wasteful number, since it uses less digits than its factorization.

11209185208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132 (or 4128 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 37.

The spelling of 11209185208 in words is "eleven billion, two hundred nine million, one hundred eighty-five thousand, two hundred eight".