16538438115216 has 120 divisors (see below), whose sum is σ = 48152257884640. Its totient is φ = 5495199480576.

The previous prime is 16538438115211. The next prime is 16538438115229. The reversal of 16538438115216 is 61251183483561.

16538438115216 is a `hidden beast` number, since 1 + 6 + 5 + 3 + 84 + 38 + 1 + 1 + 521 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (16538438115211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5578126 + ... + 8012013.

Almost surely, 2^{16538438115216} is an apocalyptic number.

16538438115216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16538438115216 is an abundant number, since it is smaller than the sum of its proper divisors (31613819769424).

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

16538438115216 is a wasteful number, since it uses less digits than its factorization.

16538438115216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13590475 (or 13590457 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 16538438115216 in words is "sixteen trillion, five hundred thirty-eight billion, four hundred thirty-eight million, one hundred fifteen thousand, two hundred sixteen".