1115540555 has 8 divisors (see below), whose sum is σ = 1363906512. Its totient is φ = 875593888.

The previous prime is 1115540551. The next prime is 1115540557. The reversal of 1115540555 is 5550455111.

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

It is a cyclic number.

It is not a de Polignac number, because 1115540555 - 2² = 1115540551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115540551) 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, 2104529 + ... + 2105058.

It is an arithmetic number, because the mean of its divisors is an integer number (170488314).

Almost surely, 2^1115540555 is an apocalyptic number.

1115540555 is a deficient number, since it is larger than the sum of its proper divisors (248365957).

1115540555 is an equidigital number, since it uses as much as digits as its factorization.

1115540555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209645.

The product of its (nonzero) digits is 12500, while the sum is 32.

The square root of 1115540555 is about 33399.7089059171. The cubic root of 1115540555 is about 1037.1186749800.

Adding to 1115540555 its reverse (5550455111), we get a palindrome (6665995666).

The spelling of 1115540555 in words is "one billion, one hundred fifteen million, five hundred forty thousand, five hundred fifty-five".