1155118512 has 80 divisors (see below), whose sum is σ = 3125299968. Its totient is φ = 366938880.

The previous prime is 1155118511. The next prime is 1155118561. The reversal of 1155118512 is 2158115511.

It is a self number, because there is not a number n which added to its sum of digits gives 1155118512.

It is not an unprimeable number, because it can be changed into a prime (1155118511) 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, 321687 + ... + 325257.

Almost surely, 2^1155118512 is an apocalyptic number.

1155118512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155118512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562649984).

1155118512 is an abundant number, since it is smaller than the sum of its proper divisors (1970181456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155118512 is a wasteful number, since it uses less digits than its factorization.

1155118512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898 (or 3892 counting only the distinct ones).

The product of its digits is 2000, while the sum is 30.

The square root of 1155118512 is about 33987.0344690442. The cubic root of 1155118512 is about 1049.2416328968.

The spelling of 1155118512 in words is "one billion, one hundred fifty-five million, one hundred eighteen thousand, five hundred twelve".