13506818416 has 80 divisors (see below), whose sum is σ = 32596913664. Its totient is φ = 5278931712.

The previous prime is 13506818399. The next prime is 13506818419. The reversal of 13506818416 is 61481860531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13506818419) 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, 64965 + ... + 176731.

Almost surely, 2^13506818416 is an apocalyptic number.

13506818416 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 13506818416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16298456832).

13506818416 is an abundant number, since it is smaller than the sum of its proper divisors (19090095248).

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

13506818416 is a wasteful number, since it uses less digits than its factorization.

13506818416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111878 (or 111872 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 13506818416 in words is "thirteen billion, five hundred six million, eight hundred eighteen thousand, four hundred sixteen".