1105556055561 has 24 divisors (see below), whose sum is σ = 1683300528000. Its totient is φ = 697274717472.

The previous prime is 1105556055557. The next prime is 1105556055613. The reversal of 1105556055561 is 1655506555011.

It is not a de Polignac number, because 1105556055561 - 2² = 1105556055557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1105556055521) 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, 4373046 + ... + 4618943.

It is an arithmetic number, because the mean of its divisors is an integer number (70137522000).

Almost surely, 2^{1105556055561} is an apocalyptic number.

It is an amenable number.

1105556055561 is a deficient number, since it is larger than the sum of its proper divisors (577744472439).

1105556055561 is a wasteful number, since it uses less digits than its factorization.

1105556055561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8992733 (or 8992730 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 45.

The spelling of 1105556055561 in words is "one trillion, one hundred five billion, five hundred fifty-six million, fifty-five thousand, five hundred sixty-one".