1191441698555 has 4 divisors (see below), whose sum is σ = 1429730038272. Its totient is φ = 953153358840.

The previous prime is 1191441698539. The next prime is 1191441698569. The reversal of 1191441698555 is 5558961441911.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1191441698555 - 2⁴ = 1191441698539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1191441698494 and 1191441698503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119144169851 + ... + 119144169860.

It is an arithmetic number, because the mean of its divisors is an integer number (357432509568).

Almost surely, 2^{1191441698555} is an apocalyptic number.

1191441698555 is a deficient number, since it is larger than the sum of its proper divisors (238288339717).

1191441698555 is an equidigital number, since it uses as much as digits as its factorization.

1191441698555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238288339716.

The product of its digits is 7776000, while the sum is 59.

The spelling of 1191441698555 in words is "one trillion, one hundred ninety-one billion, four hundred forty-one million, six hundred ninety-eight thousand, five hundred fifty-five".