16538086656 has 288 divisors, whose sum is σ = 60194328320. Its totient is φ = 4361527296.

The previous prime is 16538086613. The next prime is 16538086673. The reversal of 16538086656 is 65668083561.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 615846 + ... + 642138.

Almost surely, 2^16538086656 is an apocalyptic number.

16538086656 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 16538086656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30097164160).

16538086656 is an abundant number, since it is smaller than the sum of its proper divisors (43656241664).

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

16538086656 is a wasteful number, since it uses less digits than its factorization.

16538086656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26338 (or 26318 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 16538086656 in words is "sixteen billion, five hundred thirty-eight million, eighty-six thousand, six hundred fifty-six".