13218016536 has 64 divisors (see below), whose sum is σ = 36726703200. Its totient is φ = 4404806784.

The previous prime is 13218016481. The next prime is 13218016573. The reversal of 13218016536 is 63561081231.

13218016536 is a `hidden beast` number, since 1 + 32 + 1 + 80 + 16 + 536 = 666.

It is a super-2 number, since 2×13218016536² (a number of 21 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 13218016536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177446 + ... + 1188618.

Almost surely, 2^13218016536 is an apocalyptic number.

It is an amenable number.

13218016536 is an abundant number, since it is smaller than the sum of its proper divisors (23508686664).

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

13218016536 is a wasteful number, since it uses less digits than its factorization.

13218016536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16665 (or 16655 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 13218016536 its reverse (63561081231), we get a palindrome (76779097767).

The spelling of 13218016536 in words is "thirteen billion, two hundred eighteen million, sixteen thousand, five hundred thirty-six".