11285709918 has 64 divisors (see below), whose sum is σ = 26578394112. Its totient is φ = 3128129280.

The previous prime is 11285709917. The next prime is 11285709923. The reversal of 11285709918 is 81990758211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11285709917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156855 + ... + 217197.

It is an arithmetic number, because the mean of its divisors is an integer number (415287408).

Almost surely, 2^11285709918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11285709918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13289197056).

11285709918 is an abundant number, since it is smaller than the sum of its proper divisors (15292684194).

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

11285709918 is a wasteful number, since it uses less digits than its factorization.

11285709918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60489.

The product of its (nonzero) digits is 362880, while the sum is 51.

The spelling of 11285709918 in words is "eleven billion, two hundred eighty-five million, seven hundred nine thousand, nine hundred eighteen".