1168161345 has 40 divisors (see below), whose sum is σ = 2255127336. Its totient is φ = 575092224.

The previous prime is 1168161331. The next prime is 1168161377. The reversal of 1168161345 is 5431618611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49660209 + 1118501136 = 7047^2 + 33444^2 .

It is not a de Polignac number, because 1168161345 - 2⁸ = 1168161089 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 105672 + ... + 116201.

Almost surely, 2^1168161345 is an apocalyptic number.

1168161345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1168161345 is a deficient number, since it is larger than the sum of its proper divisors (1086965991).

1168161345 is a wasteful number, since it uses less digits than its factorization.

1168161345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221903 (or 221894 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1168161345 is about 34178.3754002439. The cubic root of 1168161345 is about 1053.1759756545.

Adding to 1168161345 its reverse (5431618611), we get a palindrome (6599779956).

The spelling of 1168161345 in words is "one billion, one hundred sixty-eight million, one hundred sixty-one thousand, three hundred forty-five".