16532639136 has 288 divisors, whose sum is σ = 53311946688. Its totient is φ = 5008988160.

The previous prime is 16532639129. The next prime is 16532639161. The reversal of 16532639136 is 63193623561.

16532639136 is a `hidden beast` number, since 1 + 6 + 5 + 3 + 2 + 639 + 1 + 3 + 6 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 16532639091 and 16532639100.

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, 6771676 + ... + 6774116.

It is an arithmetic number, because the mean of its divisors is an integer number (185110926).

Almost surely, 2^16532639136 is an apocalyptic number.

16532639136 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 16532639136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26655973344).

16532639136 is an abundant number, since it is smaller than the sum of its proper divisors (36779307552).

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

16532639136 is a wasteful number, since it uses less digits than its factorization.

16532639136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546 (or 2526 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The spelling of 16532639136 in words is "sixteen billion, five hundred thirty-two million, six hundred thirty-nine thousand, one hundred thirty-six".