1144365161 has 4 divisors (see below), whose sum is σ = 1194120192. Its totient is φ = 1094610132.

The previous prime is 1144365151. The next prime is 1144365197. The reversal of 1144365161 is 1615634411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1615634411 = 1607 ⋅1005373.

It is a cyclic number.

It is not a de Polignac number, because 1144365161 - 2⁶ = 1144365097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144365151) 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, 24877481 + ... + 24877526.

It is an arithmetic number, because the mean of its divisors is an integer number (298530048).

Almost surely, 2^1144365161 is an apocalyptic number.

It is an amenable number.

1144365161 is a deficient number, since it is larger than the sum of its proper divisors (49755031).

1144365161 is an equidigital number, since it uses as much as digits as its factorization.

1144365161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49755030.

The product of its digits is 8640, while the sum is 32.

The square root of 1144365161 is about 33828.4667255257. The cubic root of 1144365161 is about 1045.9755733175.

Adding to 1144365161 its reverse (1615634411), we get a palindrome (2759999572).

The spelling of 1144365161 in words is "one billion, one hundred forty-four million, three hundred sixty-five thousand, one hundred sixty-one".