1144451511 has 24 divisors (see below), whose sum is σ = 1959228544. Its totient is φ = 653971320.

The previous prime is 1144451507. The next prime is 1144451527. The reversal of 1144451511 is 1151544411.

It is a happy number.

1144451511 is a `hidden beast` number, since 1 + 144 + 4 + 5 + 1 + 511 = 666.

It is not a de Polignac number, because 1144451511 - 2² = 1144451507 is a prime.

It is a super-2 number, since 2×1144451511² = 2619538522060366242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144451531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 334705 + ... + 338106.

Almost surely, 2^1144451511 is an apocalyptic number.

1144451511 is a deficient number, since it is larger than the sum of its proper divisors (814777033).

1144451511 is an frugal number, since it uses more digits than its factorization.

1144451511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672833 (or 672821 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 1144451511 is about 33829.7429934074. The cubic root of 1144451511 is about 1046.0018812718.

Adding to 1144451511 its reverse (1151544411), we get a palindrome (2295995922).

The spelling of 1144451511 in words is "one billion, one hundred forty-four million, four hundred fifty-one thousand, five hundred eleven".