1144663361 has 4 divisors (see below), whose sum is σ = 1144929492. Its totient is φ = 1144397232.

The previous prime is 1144663337. The next prime is 1144663381. The reversal of 1144663361 is 1633664411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1633664411 = 983 ⋅1661917.

It can be written as a sum of positive squares in 2 ways, for example, as 541027600 + 603635761 = 23260^2 + 24569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144663361 - 2³⁰ = 70921537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1144663381) 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, 126506 + ... + 135251.

It is an arithmetic number, because the mean of its divisors is an integer number (286232373).

Almost surely, 2^1144663361 is an apocalyptic number.

It is an amenable number.

1144663361 is a deficient number, since it is larger than the sum of its proper divisors (266131).

1144663361 is an equidigital number, since it uses as much as digits as its factorization.

1144663361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266130.

The product of its digits is 31104, while the sum is 35.

The square root of 1144663361 is about 33832.8739689669. The cubic root of 1144663361 is about 1046.0664192695.

The spelling of 1144663361 in words is "one billion, one hundred forty-four million, six hundred sixty-three thousand, three hundred sixty-one".