1155551116 has 6 divisors (see below), whose sum is σ = 2022214460. Its totient is φ = 577775556.

The previous prime is 1155551113. The next prime is 1155551123. The reversal of 1155551116 is 6111555511.

It is not an unprimeable number, because it can be changed into a prime (1155551113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144443886 + ... + 144443893.

Almost surely, 2^1155551116 is an apocalyptic number.

It is an amenable number.

1155551116 is a deficient number, since it is larger than the sum of its proper divisors (866663344).

1155551116 is a wasteful number, since it uses less digits than its factorization.

1155551116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288887783 (or 288887781 counting only the distinct ones).

The product of its digits is 3750, while the sum is 31.

The square root of 1155551116 is about 33993.3981237534. The cubic root of 1155551116 is about 1049.3726005479.

The spelling of 1155551116 in words is "one billion, one hundred fifty-five million, five hundred fifty-one thousand, one hundred sixteen".