1191080108905 has 8 divisors (see below), whose sum is σ = 1429316646912. Its totient is φ = 952850409648.

The previous prime is 1191080108903. The next prime is 1191080108909. The reversal of 1191080108905 is 5098010801911.

It is a happy number.

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 1191080108905 - 2¹ = 1191080108903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1191080108903) 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, 1318377 + ... + 2029846.

It is an arithmetic number, because the mean of its divisors is an integer number (178664580864).

Almost surely, 2^{1191080108905} is an apocalyptic number.

It is an amenable number.

1191080108905 is a deficient number, since it is larger than the sum of its proper divisors (238236538007).

1191080108905 is an equidigital number, since it uses as much as digits as its factorization.

1191080108905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419375.

The product of its (nonzero) digits is 25920, while the sum is 43.

The spelling of 1191080108905 in words is "one trillion, one hundred ninety-one billion, eighty million, one hundred eight thousand, nine hundred five".