11201611806 has 48 divisors (see below), whose sum is σ = 30258903168. Its totient is φ = 2909509200.

The previous prime is 11201611781. The next prime is 11201611853. The reversal of 11201611806 is 60811610211.

It is a super-2 number, since 2×11201611806² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11201611806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4039600 + ... + 4042371.

It is an arithmetic number, because the mean of its divisors is an integer number (630393816).

Almost surely, 2^11201611806 is an apocalyptic number.

11201611806 is an abundant number, since it is smaller than the sum of its proper divisors (19057291362).

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

11201611806 is a wasteful number, since it uses less digits than its factorization.

11201611806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081997 (or 8081994 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The spelling of 11201611806 in words is "eleven billion, two hundred one million, six hundred eleven thousand, eight hundred six".