1115111616 has 56 divisors (see below), whose sum is σ = 2983595760. Its totient is φ = 367521792.

The previous prime is 1115111611. The next prime is 1115111629. The reversal of 1115111616 is 6161115111.

It is a super-2 number, since 2×1115111616² = 2486947832276262912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1115111611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15541 + ... + 49716.

Almost surely, 2^1115111616 is an apocalyptic number.

1115111616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1115111616 is an abundant number, since it is smaller than the sum of its proper divisors (1868484144).

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

1115111616 is an equidigital number, since it uses as much as digits as its factorization.

1115111616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65361 (or 65351 counting only the distinct ones).

The product of its digits is 180, while the sum is 24.

The square root of 1115111616 is about 33393.2869900524. The cubic root of 1115111616 is about 1036.9857296632.

Adding to 1115111616 its reverse (6161115111), we get a palindrome (7276226727).

The spelling of 1115111616 in words is "one billion, one hundred fifteen million, one hundred eleven thousand, six hundred sixteen".