1099561104511 has 8 divisors (see below), whose sum is σ = 1125587368400. Its totient is φ = 1073555525952.

The previous prime is 1099561104503. The next prime is 1099561104589. The reversal of 1099561104511 is 1154011659901.

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 1099561104511 - 2³ = 1099561104503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099561104011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5063736 + ... + 5276413.

It is an arithmetic number, because the mean of its divisors is an integer number (140698421050).

Almost surely, 2^{1099561104511} is an apocalyptic number.

1099561104511 is a deficient number, since it is larger than the sum of its proper divisors (26026263889).

1099561104511 is a wasteful number, since it uses less digits than its factorization.

1099561104511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10342665.

The product of its (nonzero) digits is 48600, while the sum is 43.

The spelling of 1099561104511 in words is "one trillion, ninety-nine billion, five hundred sixty-one million, one hundred four thousand, five hundred eleven".