5511565551 has 8 divisors (see below), whose sum is σ = 7389809280. Its totient is φ = 3653849432.

The previous prime is 5511565531. The next prime is 5511565571. The reversal of 5511565551 is 1555651155.

It is an interprime number because it is at equal distance from previous prime (5511565531) and next prime (5511565571).

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 5511565551 - 2⁵ = 5511565519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5511565531) 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, 5131275 + ... + 5132348.

It is an arithmetic number, because the mean of its divisors is an integer number (923726160).

Almost surely, 2^5511565551 is an apocalyptic number.

5511565551 is a deficient number, since it is larger than the sum of its proper divisors (1878243729).

5511565551 is a wasteful number, since it uses less digits than its factorization.

5511565551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263805.

The product of its digits is 93750, while the sum is 39.

The square root of 5511565551 is about 74239.9188509794. The cubic root of 5511565551 is about 1766.4105869760.

The spelling of 5511565551 in words is "five billion, five hundred eleven million, five hundred sixty-five thousand, five hundred fifty-one".