1111553555 has 16 divisors (see below), whose sum is σ = 1540136640. Its totient is φ = 754348032.

The previous prime is 1111553549. The next prime is 1111553567. The reversal of 1111553555 is 5553551111.

It is a cyclic number.

It is not a de Polignac number, because 1111553555 - 2⁶ = 1111553491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160310 + ... + 167099.

It is an arithmetic number, because the mean of its divisors is an integer number (96258540).

Almost surely, 2^1111553555 is an apocalyptic number.

1111553555 is a deficient number, since it is larger than the sum of its proper divisors (428583085).

1111553555 is an equidigital number, since it uses as much as digits as its factorization.

1111553555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327518.

The product of its digits is 9375, while the sum is 32.

The square root of 1111553555 is about 33339.9693311197. The cubic root of 1111553555 is about 1035.8816280108.

The spelling of 1111553555 in words is "one billion, one hundred eleven million, five hundred fifty-three thousand, five hundred fifty-five".