12535811316 has 144 divisors (see below), whose sum is σ = 37873080000. Its totient is φ = 3575347776.

The previous prime is 12535811303. The next prime is 12535811389. The reversal of 12535811316 is 61311853521.

It is a happy number.

12535811316 is a `hidden beast` number, since 1 + 2 + 53 + 581 + 13 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3580935 + ... + 3584433.

It is an arithmetic number, because the mean of its divisors is an integer number (263007500).

Almost surely, 2^12535811316 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 12535811316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18936540000).

12535811316 is an abundant number, since it is smaller than the sum of its proper divisors (25337268684).

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

12535811316 is a wasteful number, since it uses less digits than its factorization.

12535811316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203 (or 4188 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The spelling of 12535811316 in words is "twelve billion, five hundred thirty-five million, eight hundred eleven thousand, three hundred sixteen".