10775544561 has 8 divisors (see below), whose sum is σ = 15963769760. Its totient is φ = 7183696356.

The previous prime is 10775544557. The next prime is 10775544569. The reversal of 10775544561 is 16544557701.

10775544561 is a `hidden beast` number, since 10 + 7 + 75 + 5 + 4 + 4 + 561 = 666.

It is not a de Polignac number, because 10775544561 - 2² = 10775544557 is a prime.

It is a super-2 number, since 2×10775544561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10775544569) 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, 199547095 + ... + 199547148.

It is an arithmetic number, because the mean of its divisors is an integer number (1995471220).

Almost surely, 2^10775544561 is an apocalyptic number.

It is an amenable number.

10775544561 is a deficient number, since it is larger than the sum of its proper divisors (5188225199).

10775544561 is an equidigital number, since it uses as much as digits as its factorization.

10775544561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399094252 (or 399094246 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 10775544561 in words is "ten billion, seven hundred seventy-five million, five hundred forty-four thousand, five hundred sixty-one".