11111611648 has 72 divisors (see below), whose sum is σ = 22831316480. Its totient is φ = 5394954240.

The previous prime is 11111611613. The next prime is 11111611649. The reversal of 11111611648 is 84611611111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111611649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229161 + ... + 1238167.

Almost surely, 2^11111611648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111611648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11415658240).

11111611648 is an abundant number, since it is smaller than the sum of its proper divisors (11719704832).

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

11111611648 is an frugal number, since it uses more digits than its factorization.

11111611648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9163 (or 9149 counting only the distinct ones).

The product of its digits is 1152, while the sum is 31.

The spelling of 11111611648 in words is "eleven billion, one hundred eleven million, six hundred eleven thousand, six hundred forty-eight".