11616111616 has 88 divisors (see below), whose sum is σ = 23759774640. Its totient is φ = 5674893312.

The previous prime is 11616111581. The next prime is 11616111623. The reversal of 11616111616 is 61611161611.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8243520 + ... + 8244928.

Almost surely, 2^11616111616 is an apocalyptic number.

11616111616 is a gapful number since it is divisible by the number (16) 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 11616111616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11879887320).

11616111616 is an abundant number, since it is smaller than the sum of its proper divisors (12143663024).

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

11616111616 is an equidigital number, since it uses as much as digits as its factorization.

11616111616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609 (or 1591 counting only the distinct ones).

The product of its digits is 1296, while the sum is 31.

It can be divided in two parts, 11 and 616111616, that multiplied together give a palindrome (6777227776).

The spelling of 11616111616 in words is "eleven billion, six hundred sixteen million, one hundred eleven thousand, six hundred sixteen".