1144664361 has 12 divisors (see below), whose sum is σ = 1662963588. Its totient is φ = 758697504.

The previous prime is 1144664351. The next prime is 1144664377. The reversal of 1144664361 is 1634664411.

1144664361 is a `hidden beast` number, since 1 + 1 + 4 + 4 + 6 + 643 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 921729600 + 222934761 = 30360^2 + 14931^2 .

It is not a de Polignac number, because 1144664361 - 2⁷ = 1144664233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144664351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 366030 + ... + 369143.

It is an arithmetic number, because the mean of its divisors is an integer number (138580299).

Almost surely, 2^1144664361 is an apocalyptic number.

It is an amenable number.

1144664361 is a deficient number, since it is larger than the sum of its proper divisors (518299227).

1144664361 is a wasteful number, since it uses less digits than its factorization.

1144664361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735352 (or 735349 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 1144664361 is about 33832.8887474895. Note that the first 3 decimals coincide. The cubic root of 1144664361 is about 1046.0667238907.

The spelling of 1144664361 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, three hundred sixty-one".