5555511505 has 4 divisors (see below), whose sum is σ = 6666613812. Its totient is φ = 4444409200.

The previous prime is 5555511503. The next prime is 5555511509. The reversal of 5555511505 is 5051155555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3889892161 + 1665619344 = 62369^2 + 40812^2 .

It is not a de Polignac number, because 5555511505 - 2¹ = 5555511503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5555511503) 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 3 ways as a sum of consecutive naturals, for example, 555551146 + ... + 555551155.

It is an arithmetic number, because the mean of its divisors is an integer number (1666653453).

Almost surely, 2^5555511505 is an apocalyptic number.

It is an amenable number.

5555511505 is a deficient number, since it is larger than the sum of its proper divisors (1111102307).

5555511505 is a wasteful number, since it uses less digits than its factorization.

5555511505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111102306.

The product of its (nonzero) digits is 78125, while the sum is 37.

The square root of 5555511505 is about 74535.3037492972. The cubic root of 5555511505 is about 1771.0929342219.

The spelling of 5555511505 in words is "five billion, five hundred fifty-five million, five hundred eleven thousand, five hundred five".