5561661567 has 16 divisors (see below), whose sum is σ = 9245359872. Its totient is φ = 2889174720.

The previous prime is 5561661527. The next prime is 5561661569. The reversal of 5561661567 is 7651661655.

It is not a de Polignac number, because 5561661567 - 2⁸ = 5561661311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561661569) 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, 12037998 + ... + 12038459.

It is an arithmetic number, because the mean of its divisors is an integer number (577834992).

Almost surely, 2^5561661567 is an apocalyptic number.

5561661567 is a deficient number, since it is larger than the sum of its proper divisors (3683698305).

5561661567 is a wasteful number, since it uses less digits than its factorization.

5561661567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24076478.

The product of its digits is 1134000, while the sum is 48.

The square root of 5561661567 is about 74576.5483714552. The cubic root of 5561661567 is about 1771.7462382709.

The spelling of 5561661567 in words is "five billion, five hundred sixty-one million, six hundred sixty-one thousand, five hundred sixty-seven".