1144555511 has 16 divisors (see below), whose sum is σ = 1277868960. Its totient is φ = 1016296320.

The previous prime is 1144555507. The next prime is 1144555523. The reversal of 1144555511 is 1155554411.

It is a cyclic number.

It is not a de Polignac number, because 1144555511 - 2² = 1144555507 is a prime.

It is a super-2 number, since 2×1144555511² = 2620014635520942242, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144558511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129221 + ... + 137793.

It is an arithmetic number, because the mean of its divisors is an integer number (79866810).

Almost surely, 2^1144555511 is an apocalyptic number.

1144555511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1144555511 is a deficient number, since it is larger than the sum of its proper divisors (133313449).

1144555511 is a wasteful number, since it uses less digits than its factorization.

1144555511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8866.

The product of its digits is 10000, while the sum is 32.

The square root of 1144555511 is about 33831.2800674169. The cubic root of 1144555511 is about 1046.0335648337.

It can be divided in two parts, 1144 and 555511, that added together give a palindrome (556655).

The spelling of 1144555511 in words is "one billion, one hundred forty-four million, five hundred fifty-five thousand, five hundred eleven".