1161538116 has 36 divisors (see below), whose sum is σ = 2726370192. Its totient is φ = 384883424.

The previous prime is 1161538099. The next prime is 1161538121. The reversal of 1161538116 is 6118351611.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1778446 + ... + 1779098.

Almost surely, 2^1161538116 is an apocalyptic number.

It is an amenable number.

1161538116 is an abundant number, since it is smaller than the sum of its proper divisors (1564832076).

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

1161538116 is an equidigital number, since it uses as much as digits as its factorization.

1161538116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 885 counting only the distinct ones).

The product of its digits is 4320, while the sum is 33.

The square root of 1161538116 is about 34081.3455720281. The cubic root of 1161538116 is about 1051.1817732720.

Adding to 1161538116 its reverse (6118351611), we get a palindrome (7279889727).

The spelling of 1161538116 in words is "one billion, one hundred sixty-one million, five hundred thirty-eight thousand, one hundred sixteen".