11818956648 has 64 divisors (see below), whose sum is σ = 31392567360. Its totient is φ = 3695215616.

The previous prime is 11818956629. The next prime is 11818956671. The reversal of 11818956648 is 84665981811.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70111 + ... + 168977.

It is an arithmetic number, because the mean of its divisors is an integer number (490508865).

Almost surely, 2^11818956648 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 11818956648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15696283680).

11818956648 is an abundant number, since it is smaller than the sum of its proper divisors (19573610712).

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

11818956648 is a wasteful number, since it uses less digits than its factorization.

11818956648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99186 (or 99182 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 57.

The spelling of 11818956648 in words is "eleven billion, eight hundred eighteen million, nine hundred fifty-six thousand, six hundred forty-eight".