11215439648 has 96 divisors (see below), whose sum is σ = 26750715264. Its totient is φ = 4518531072.

The previous prime is 11215439647. The next prime is 11215439659. The reversal of 11215439648 is 84693451211.

It is a junction number, because it is equal to n+sod(n) for n = 11215439599 and 11215439608.

It is not an unprimeable number, because it can be changed into a prime (11215439647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5532011 + ... + 5534037.

It is an arithmetic number, because the mean of its divisors is an integer number (278653284).

Almost surely, 2^11215439648 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 11215439648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13375357632).

11215439648 is an abundant number, since it is smaller than the sum of its proper divisors (15535275616).

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

11215439648 is a wasteful number, since it uses less digits than its factorization.

11215439648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3514 (or 3506 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The spelling of 11215439648 in words is "eleven billion, two hundred fifteen million, four hundred thirty-nine thousand, six hundred forty-eight".