11201450661 has 16 divisors (see below), whose sum is σ = 16619065920. Its totient is φ = 7456687920.

The previous prime is 11201450647. The next prime is 11201450683. The reversal of 11201450661 is 16605410211.

11201450661 is a `hidden beast` number, since 1 + 1 + 201 + 450 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 11201450661 - 2⁶ = 11201450597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201450461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285270 + ... + 322151.

It is an arithmetic number, because the mean of its divisors is an integer number (1038691620).

Almost surely, 2^11201450661 is an apocalyptic number.

It is an amenable number.

11201450661 is a deficient number, since it is larger than the sum of its proper divisors (5417615259).

11201450661 is an equidigital number, since it uses as much as digits as its factorization.

11201450661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608113 (or 608107 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 11201450661 its reverse (16605410211), we get a palindrome (27806860872).

The spelling of 11201450661 in words is "eleven billion, two hundred one million, four hundred fifty thousand, six hundred sixty-one".