1106556056561 has 8 divisors (see below), whose sum is σ = 1107965268384. Its totient is φ = 1105147199520.

The previous prime is 1106556056549. The next prime is 1106556056581. The reversal of 1106556056561 is 1656506556011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1106556056561 is a prime.

It is a super-2 number, since 2×1106556056561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1106556056581) 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, 6459365 + ... + 6628461.

It is an arithmetic number, because the mean of its divisors is an integer number (138495658548).

Almost surely, 2^{1106556056561} is an apocalyptic number.

It is an amenable number.

1106556056561 is a deficient number, since it is larger than the sum of its proper divisors (1409211823).

1106556056561 is an equidigital number, since it uses as much as digits as its factorization.

1106556056561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177391.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 1106556056561 in words is "one trillion, one hundred six billion, five hundred fifty-six million, fifty-six thousand, five hundred sixty-one".