1105556555561 has 8 divisors (see below), whose sum is σ = 1109996335200. Its totient is φ = 1101120531552.

The previous prime is 1105556555549. The next prime is 1105556555569. The reversal of 1105556555561 is 1655556555011.

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

It is a cyclic number.

It is not a de Polignac number, because 1105556555561 - 2²⁶ = 1105489446697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1105556555569) 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, 348236 + ... + 1527213.

It is an arithmetic number, because the mean of its divisors is an integer number (138749541900).

Almost surely, 2^{1105556555561} is an apocalyptic number.

It is an amenable number.

1105556555561 is a deficient number, since it is larger than the sum of its proper divisors (4439779639).

1105556555561 is a wasteful number, since it uses less digits than its factorization.

1105556555561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877815.

The product of its (nonzero) digits is 2812500, while the sum is 50.

The spelling of 1105556555561 in words is "one trillion, one hundred five billion, five hundred fifty-six million, five hundred fifty-five thousand, five hundred sixty-one".