5540111561 has 8 divisors (see below), whose sum is σ = 5927299200. Its totient is φ = 5162484240.

The previous prime is 5540111557. The next prime is 5540111579. The reversal of 5540111561 is 1651110455.

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 5540111561 - 2² = 5540111557 is a prime.

It is a super-2 number, since 2×5540111561² = 61385672216651713442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5540111261) 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, 2388881 + ... + 2391198.

It is an arithmetic number, because the mean of its divisors is an integer number (740912400).

Almost surely, 2^5540111561 is an apocalyptic number.

It is an amenable number.

5540111561 is a deficient number, since it is larger than the sum of its proper divisors (387187639).

5540111561 is a wasteful number, since it uses less digits than its factorization.

5540111561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780159.

The product of its (nonzero) digits is 3000, while the sum is 29.

The square root of 5540111561 is about 74431.9256838086. The cubic root of 5540111561 is about 1769.4549228630.

The spelling of 5540111561 in words is "five billion, five hundred forty million, one hundred eleven thousand, five hundred sixty-one".