5551111555 has 24 divisors (see below), whose sum is σ = 7330102416. Its totient is φ = 4032684480.

The previous prime is 5551111549. The next prime is 5551111597.

5551111555 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5551111555 - 2⁷ = 5551111427 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 5551111555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 598584 + ... + 607786.

It is an arithmetic number, because the mean of its divisors is an integer number (305420934).

Almost surely, 2^5551111555 is an apocalyptic number.

5551111555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5551111555 is a deficient number, since it is larger than the sum of its proper divisors (1778990861).

5551111555 is a wasteful number, since it uses less digits than its factorization.

5551111555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10227 (or 10216 counting only the distinct ones).

The product of its digits is 15625, while the sum is 34.

The square root of 5551111555 is about 74505.7820239476. The cubic root of 5551111555 is about 1770.6252438016.

The spelling of 5551111555 in words is "five billion, five hundred fifty-one million, one hundred eleven thousand, five hundred fifty-five".