6551111505 has 16 divisors (see below), whose sum is σ = 10937508480. Its totient is φ = 3342016128.

The previous prime is 6551111503. The next prime is 6551111507. The reversal of 6551111505 is 5051111556.

It is an interprime number because it is at equal distance from previous prime (6551111503) and next prime (6551111507).

It is not a de Polignac number, because 6551111505 - 2¹ = 6551111503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6551111503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9494020 + ... + 9494709.

It is an arithmetic number, because the mean of its divisors is an integer number (683594280).

Almost surely, 2^6551111505 is an apocalyptic number.

It is an amenable number.

6551111505 is a deficient number, since it is larger than the sum of its proper divisors (4386396975).

6551111505 is a wasteful number, since it uses less digits than its factorization.

6551111505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18988760.

The product of its (nonzero) digits is 3750, while the sum is 30.

The square root of 6551111505 is about 80938.9368907203. The cubic root of 6551111505 is about 1871.1344603761.

The spelling of 6551111505 in words is "six billion, five hundred fifty-one million, one hundred eleven thousand, five hundred five".