1145161144 has 16 divisors (see below), whose sum is σ = 2157356520. Its totient is φ = 569866080.

The previous prime is 1145161093. The next prime is 1145161219. The reversal of 1145161144 is 4411615411.

It is a super-2 number, since 2×1145161144² = 2622788091454777472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337519 + ... + 340894.

Almost surely, 2^1145161144 is an apocalyptic number.

It is an amenable number.

1145161144 is a deficient number, since it is larger than the sum of its proper divisors (1012195376).

1145161144 is a wasteful number, since it uses less digits than its factorization.

1145161144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678630 (or 678626 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 1145161144 is about 33840.2296682514. The cubic root of 1145161144 is about 1046.2180325836.

Adding to 1145161144 its reverse (4411615411), we get a palindrome (5556776555).

The spelling of 1145161144 in words is "one billion, one hundred forty-five million, one hundred sixty-one thousand, one hundred forty-four".