1191117259989 has 24 divisors (see below), whose sum is σ = 1776324705792. Its totient is φ = 768323460960.

The previous prime is 1191117259987. The next prime is 1191117260017. The reversal of 1191117259989 is 9899527111911.

1191117259989 is a `hidden beast` number, since 1 + 19 + 11 + 17 + 2 + 599 + 8 + 9 = 666.

It is not a de Polignac number, because 1191117259989 - 2¹ = 1191117259987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191117259987) 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, 1166272 + ... + 1934534.

It is an arithmetic number, because the mean of its divisors is an integer number (74013529408).

Almost surely, 2^{1191117259989} is an apocalyptic number.

It is an amenable number.

1191117259989 is a deficient number, since it is larger than the sum of its proper divisors (585207445803).

1191117259989 is a wasteful number, since it uses less digits than its factorization.

1191117259989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773857 (or 773854 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 63.

The spelling of 1191117259989 in words is "one trillion, one hundred ninety-one billion, one hundred seventeen million, two hundred fifty-nine thousand, nine hundred eighty-nine".