1115110661 has 8 divisors (see below), whose sum is σ = 1305495744. Its totient is φ = 932496480.

The previous prime is 1115110649. The next prime is 1115110663. The reversal of 1115110661 is 1660115111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115110661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115110663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1942415 + ... + 1942988.

It is an arithmetic number, because the mean of its divisors is an integer number (163186968).

Almost surely, 2^1115110661 is an apocalyptic number.

It is an amenable number.

1115110661 is a deficient number, since it is larger than the sum of its proper divisors (190385083).

1115110661 is an equidigital number, since it uses as much as digits as its factorization.

1115110661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885451.

The product of its (nonzero) digits is 180, while the sum is 23.

The square root of 1115110661 is about 33393.2726907681. The cubic root of 1115110661 is about 1036.9854336325.

Adding to 1115110661 its reverse (1660115111), we get a palindrome (2775225772).

It can be divided in two parts, 11151 and 10661, that added together give a palindrome (21812).

The spelling of 1115110661 in words is "one billion, one hundred fifteen million, one hundred ten thousand, six hundred sixty-one".