11201661788 has 12 divisors (see below), whose sum is σ = 19608602832. Its totient is φ = 5599203840.

The previous prime is 11201661787. The next prime is 11201661791. The reversal of 11201661788 is 88716610211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201661781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391208 + ... + 418863.

It is an arithmetic number, because the mean of its divisors is an integer number (1634050236).

Almost surely, 2^11201661788 is an apocalyptic number.

It is an amenable number.

11201661788 is a deficient number, since it is larger than the sum of its proper divisors (8406941044).

11201661788 is a wasteful number, since it uses less digits than its factorization.

11201661788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813532 (or 813530 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 11201661788 in words is "eleven billion, two hundred one million, six hundred sixty-one thousand, seven hundred eighty-eight".