1155541144 has 8 divisors (see below), whose sum is σ = 2166639660. Its totient is φ = 577770568.

The previous prime is 1155541129. The next prime is 1155541147. The reversal of 1155541144 is 4411455511.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155541147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72221314 + ... + 72221329.

Almost surely, 2^1155541144 is an apocalyptic number.

It is an amenable number.

1155541144 is a deficient number, since it is larger than the sum of its proper divisors (1011098516).

1155541144 is a wasteful number, since it uses less digits than its factorization.

1155541144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144442649 (or 144442645 counting only the distinct ones).

The product of its digits is 8000, while the sum is 31.

The square root of 1155541144 is about 33993.2514478977. The cubic root of 1155541144 is about 1049.3695819670.

Adding to 1155541144 its reverse (4411455511), we get a palindrome (5566996655).

The spelling of 1155541144 in words is "one billion, one hundred fifty-five million, five hundred forty-one thousand, one hundred forty-four".