11315321136 has 160 divisors (see below), whose sum is σ = 37748774400. Its totient is φ = 3178103040.

The previous prime is 11315321131. The next prime is 11315321137. The reversal of 11315321136 is 63112351311.

It is a happy number.

11315321136 is a `hidden beast` number, since 1 + 13 + 1 + 532 + 113 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11315321131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146706 + ... + 210126.

It is an arithmetic number, because the mean of its divisors is an integer number (235929840).

Almost surely, 2^11315321136 is an apocalyptic number.

11315321136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11315321136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18874387200).

11315321136 is an abundant number, since it is smaller than the sum of its proper divisors (26433453264).

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

11315321136 is a wasteful number, since it uses less digits than its factorization.

11315321136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63504 (or 63492 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

Adding to 11315321136 its reverse (63112351311), we get a palindrome (74427672447).

The spelling of 11315321136 in words is "eleven billion, three hundred fifteen million, three hundred twenty-one thousand, one hundred thirty-six".