1155144556 has 24 divisors (see below), whose sum is σ = 2058260624. Its totient is φ = 567103680.

The previous prime is 1155144553. The next prime is 1155144563. The reversal of 1155144556 is 6554415511.

It is not an unprimeable number, because it can be changed into a prime (1155144553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145711 + ... + 153433.

Almost surely, 2^1155144556 is an apocalyptic number.

It is an amenable number.

1155144556 is a deficient number, since it is larger than the sum of its proper divisors (903116068).

1155144556 is a wasteful number, since it uses less digits than its factorization.

1155144556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8401 (or 8399 counting only the distinct ones).

The product of its digits is 60000, while the sum is 37.

The square root of 1155144556 is about 33987.4176129932. The cubic root of 1155144556 is about 1049.2495184495.

The spelling of 1155144556 in words is "one billion, one hundred fifty-five million, one hundred forty-four thousand, five hundred fifty-six".