1105565544561 has 16 divisors (see below), whose sum is σ = 1514058974208. Its totient is φ = 717061363200.

The previous prime is 1105565544557. The next prime is 1105565544571. The reversal of 1105565544561 is 1654455655011.

It is not a de Polignac number, because 1105565544561 - 2² = 1105565544557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1105565544561.

It is not an unprimeable number, because it can be changed into a prime (1105565544571) 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, 870256 + ... + 1722926.

It is an arithmetic number, because the mean of its divisors is an integer number (94628685888).

Almost surely, 2^{1105565544561} is an apocalyptic number.

It is an amenable number.

1105565544561 is a deficient number, since it is larger than the sum of its proper divisors (408493429647).

1105565544561 is a wasteful number, since it uses less digits than its factorization.

1105565544561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864392.

The product of its (nonzero) digits is 1800000, while the sum is 48.

The spelling of 1105565544561 in words is "one trillion, one hundred five billion, five hundred sixty-five million, five hundred forty-four thousand, five hundred sixty-one".