5521116561 has 4 divisors (see below), whose sum is σ = 7361488752. Its totient is φ = 3680744372.

The previous prime is 5521116553. The next prime is 5521116563. The reversal of 5521116561 is 1656111255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5521116561 - 2³ = 5521116553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5521116563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920186091 + ... + 920186096.

It is an arithmetic number, because the mean of its divisors is an integer number (1840372188).

Almost surely, 2^5521116561 is an apocalyptic number.

It is an amenable number.

5521116561 is a deficient number, since it is larger than the sum of its proper divisors (1840372191).

5521116561 is a wasteful number, since it uses less digits than its factorization.

5521116561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840372190.

The product of its digits is 9000, while the sum is 33.

The square root of 5521116561 is about 74304.2163070172. The cubic root of 5521116561 is about 1767.4303377239.

The spelling of 5521116561 in words is "five billion, five hundred twenty-one million, one hundred sixteen thousand, five hundred sixty-one".