16549650432 has 420 divisors, whose sum is σ = 57626711010. Its totient is φ = 4719181824.

The previous prime is 16549650431. The next prime is 16549650443. The reversal of 16549650432 is 23405694561.

16549650432 is a `hidden beast` number, since 1 + 6 + 54 + 96 + 504 + 3 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11851370496 + 4698279936 = 108864^2 + 68544^2 .

It is not an unprimeable number, because it can be changed into a prime (16549650431) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 32513794 + ... + 32514302.

Almost surely, 2^16549650432 is an apocalyptic number.

16549650432 is a gapful number since it is divisible by the number (12) 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 16549650432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28813355505).

16549650432 is an abundant number, since it is smaller than the sum of its proper divisors (41077060578).

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

16549650432 is an frugal number, since it uses more digits than its factorization.

16549650432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 16549650432 in words is "sixteen billion, five hundred forty-nine million, six hundred fifty thousand, four hundred thirty-two".