10611110605561 has 4 divisors (see below), whose sum is σ = 10977010971300. Its totient is φ = 10245210239824.

The previous prime is 10611110605517. The next prime is 10611110605567. The reversal of 10611110605561 is 16550601111601.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2664546934336 + 7946563671225 = 1632344^2 + 2818965^2 .

It is a cyclic number.

It is not a de Polignac number, because 10611110605561 - 2¹⁵ = 10611110572793 is a prime.

It is a super-2 number, since 2×10611110605561² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10611110605567) 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, 182950182826 + ... + 182950182883.

It is an arithmetic number, because the mean of its divisors is an integer number (2744252742825).

Almost surely, 2^{10611110605561} is an apocalyptic number.

It is an amenable number.

10611110605561 is a deficient number, since it is larger than the sum of its proper divisors (365900365739).

10611110605561 is an equidigital number, since it uses as much as digits as its factorization.

10611110605561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365900365738.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 10611110605561 in words is "ten trillion, six hundred eleven billion, one hundred ten million, six hundred five thousand, five hundred sixty-one".