5661516011 has 4 divisors (see below), whose sum is σ = 5661943224. Its totient is φ = 5661088800.

The previous prime is 5661515969. The next prime is 5661516043. The reversal of 5661516011 is 1106151665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5661516011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661516061) 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, 193070 + ... + 220451.

It is an arithmetic number, because the mean of its divisors is an integer number (1415485806).

Almost surely, 2^5661516011 is an apocalyptic number.

5661516011 is a deficient number, since it is larger than the sum of its proper divisors (427213).

5661516011 is a wasteful number, since it uses less digits than its factorization.

5661516011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427212.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 5661516011 is about 75243.0462634256. The cubic root of 5661516011 is about 1782.2867561784.

Adding to 5661516011 its reverse (1106151665), we get a palindrome (6767667676).

The spelling of 5661516011 in words is "five billion, six hundred sixty-one million, five hundred sixteen thousand, eleven".