11817031648 has 48 divisors (see below), whose sum is σ = 23679477360. Its totient is φ = 5803370496.

The previous prime is 11817031631. The next prime is 11817031651. The reversal of 11817031648 is 84613071811.

It is a self number, because there is not a number n which added to its sum of digits gives 11817031648.

It is a congruent number.

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, 3194536 + ... + 3198232.

It is an arithmetic number, because the mean of its divisors is an integer number (493322445).

Almost surely, 2^11817031648 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 11817031648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11839738680).

11817031648 is an abundant number, since it is smaller than the sum of its proper divisors (11862445712).

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

11817031648 is a wasteful number, since it uses less digits than its factorization.

11817031648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459 (or 5451 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 11817031648 in words is "eleven billion, eight hundred seventeen million, thirty-one thousand, six hundred forty-eight".