1161555016 has 16 divisors (see below), whose sum is σ = 2272608000. Its totient is φ = 555526224.

The previous prime is 1161554941. The next prime is 1161555019. The reversal of 1161555016 is 6105551611.

It is not an unprimeable number, because it can be changed into a prime (1161555019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3156216 + ... + 3156583.

It is an arithmetic number, because the mean of its divisors is an integer number (142038000).

Almost surely, 2^1161555016 is an apocalyptic number.

It is an amenable number.

1161555016 is a deficient number, since it is larger than the sum of its proper divisors (1111052984).

1161555016 is a wasteful number, since it uses less digits than its factorization.

1161555016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6312828 (or 6312824 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 1161555016 is about 34081.5935073465. The cubic root of 1161555016 is about 1051.1868713644.

The spelling of 1161555016 in words is "one billion, one hundred sixty-one million, five hundred fifty-five thousand, sixteen".