1115033661 has 32 divisors (see below), whose sum is σ = 1926432000. Its totient is φ = 637156800.

The previous prime is 1115033657. The next prime is 1115033669. The reversal of 1115033661 is 1663305111.

It is not a de Polignac number, because 1115033661 - 2² = 1115033657 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 (1115033669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50940 + ... + 69461.

It is an arithmetic number, because the mean of its divisors is an integer number (60201000).

Almost surely, 2^1115033661 is an apocalyptic number.

It is an amenable number.

1115033661 is a deficient number, since it is larger than the sum of its proper divisors (811398339).

1115033661 is an equidigital number, since it uses as much as digits as its factorization.

1115033661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120431 (or 120411 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1115033661 is about 33392.1197440354. The cubic root of 1115033661 is about 1036.9615646363.

Adding to 1115033661 its reverse (1663305111), we get a palindrome (2778338772).

The spelling of 1115033661 in words is "one billion, one hundred fifteen million, thirty-three thousand, six hundred sixty-one".