1144511155 has 16 divisors (see below), whose sum is σ = 1399601664. Its totient is φ = 898283520.

The previous prime is 1144511131. The next prime is 1144511161. The reversal of 1144511155 is 5511154411.

It is not a de Polignac number, because 1144511155 - 2²¹ = 1142414003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 61507 + ... + 77923.

It is an arithmetic number, because the mean of its divisors is an integer number (87475104).

Almost surely, 2^1144511155 is an apocalyptic number.

1144511155 is a deficient number, since it is larger than the sum of its proper divisors (255090509).

1144511155 is a wasteful number, since it uses less digits than its factorization.

1144511155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16686.

The product of its digits is 2000, while the sum is 28.

The square root of 1144511155 is about 33830.6245138927. The cubic root of 1144511155 is about 1046.0200520293.

Adding to 1144511155 its reverse (5511154411), we get a palindrome (6655665566).

The spelling of 1144511155 in words is "one billion, one hundred forty-four million, five hundred eleven thousand, one hundred fifty-five".