1171557009169 has 8 divisors (see below), whose sum is σ = 1187706091680. Its totient is φ = 1155410639136.

The previous prime is 1171557009151. The next prime is 1171557009173. The reversal of 1171557009169 is 9619007551711.

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 1171557009169 - 2⁷ = 1171557009041 is a prime.

It is a super-2 number, since 2×1171557009169² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171557009869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199434 + ... + 1543660.

It is an arithmetic number, because the mean of its divisors is an integer number (148463261460).

Almost surely, 2^{1171557009169} is an apocalyptic number.

It is an amenable number.

1171557009169 is a deficient number, since it is larger than the sum of its proper divisors (16149082511).

1171557009169 is a wasteful number, since it uses less digits than its factorization.

1171557009169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356239.

The product of its (nonzero) digits is 595350, while the sum is 52.

The spelling of 1171557009169 in words is "one trillion, one hundred seventy-one billion, five hundred fifty-seven million, nine thousand, one hundred sixty-nine".