1173997169857 has 4 divisors (see below), whose sum is σ = 1211868046336. Its totient is φ = 1136126293380.

The previous prime is 1173997169801. The next prime is 1173997169881. The reversal of 1173997169857 is 7589617993711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1173997169857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1173997169857.

It is not an unprimeable number, because it can be changed into a prime (1173997119857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18935438193 + ... + 18935438254.

It is an arithmetic number, because the mean of its divisors is an integer number (302967011584).

Almost surely, 2^{1173997169857} is an apocalyptic number.

It is an amenable number.

1173997169857 is a deficient number, since it is larger than the sum of its proper divisors (37870876479).

1173997169857 is an equidigital number, since it uses as much as digits as its factorization.

1173997169857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37870876478.

The product of its digits is 180033840, while the sum is 73.

The spelling of 1173997169857 in words is "one trillion, one hundred seventy-three billion, nine hundred ninety-seven million, one hundred sixty-nine thousand, eight hundred fifty-seven".