10611105561 has 24 divisors (see below), whose sum is σ = 17763467904. Its totient is φ = 5978085120.

The previous prime is 10611105497. The next prime is 10611105563. The reversal of 10611105561 is 16550111601.

10611105561 is a `hidden beast` number, since 106 + 1 + 1 + 1 + 0 + 556 + 1 = 666.

It is not a de Polignac number, because 10611105561 - 2⁶ = 10611105497 is a prime.

It is a super-2 number, since 2×10611105561² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10611105563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1181656 + ... + 1190601.

It is an arithmetic number, because the mean of its divisors is an integer number (740144496).

Almost surely, 2^10611105561 is an apocalyptic number.

It is an amenable number.

10611105561 is a deficient number, since it is larger than the sum of its proper divisors (7152362343).

10611105561 is a wasteful number, since it uses less digits than its factorization.

10611105561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372341 (or 2372338 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 10611105561 in words is "ten billion, six hundred eleven million, one hundred five thousand, five hundred sixty-one".