5561506111 has 8 divisors (see below), whose sum is σ = 6356941344. Its totient is φ = 4766304480.

The previous prime is 5561506109. The next prime is 5561506127. The reversal of 5561506111 is 1116051655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5561506111 - 2¹ = 5561506109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561506411) 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, 4000 + ... + 105541.

It is an arithmetic number, because the mean of its divisors is an integer number (794617668).

Almost surely, 2^5561506111 is an apocalyptic number.

5561506111 is a deficient number, since it is larger than the sum of its proper divisors (795435233).

5561506111 is a wasteful number, since it uses less digits than its factorization.

5561506111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116801.

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 5561506111 is about 74575.5061062277. The cubic root of 5561506111 is about 1771.7297305453.

Adding to 5561506111 its reverse (1116051655), we get a palindrome (6677557766).

The spelling of 5561506111 in words is "five billion, five hundred sixty-one million, five hundred six thousand, one hundred eleven".