5511110561 has 16 divisors (see below), whose sum is σ = 6061497408. Its totient is φ = 4969113600.

The previous prime is 5511110519. The next prime is 5511110567. The reversal of 5511110561 is 1650111155.

It is a de Polignac number, because none of the positive numbers 2^k-5511110561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5511110561.

It is not an unprimeable number, because it can be changed into a prime (5511110567) 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, 732941 + ... + 740421.

It is an arithmetic number, because the mean of its divisors is an integer number (378843588).

Almost surely, 2^5511110561 is an apocalyptic number.

It is an amenable number.

5511110561 is a deficient number, since it is larger than the sum of its proper divisors (550386847).

5511110561 is a wasteful number, since it uses less digits than its factorization.

5511110561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8032.

The product of its (nonzero) digits is 750, while the sum is 26.

The square root of 5511110561 is about 74236.8544659592. The cubic root of 5511110561 is about 1766.3619788106.

The spelling of 5511110561 in words is "five billion, five hundred eleven million, one hundred ten thousand, five hundred sixty-one".