16644906432 has 1120 divisors, whose sum is σ = 67270579200. Its totient is φ = 4023613440.

The previous prime is 16644906401. The next prime is 16644906463. The reversal of 16644906432 is 23460944661.

16644906432 is a `hidden beast` number, since 16 + 64 + 490 + 64 + 32 = 666.

It is an interprime number because it is at equal distance from previous prime (16644906401) and next prime (16644906463).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 449862318 + ... + 449862354.

Almost surely, 2^16644906432 is an apocalyptic number.

16644906432 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 16644906432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33635289600).

16644906432 is an abundant number, since it is smaller than the sum of its proper divisors (50625672768).

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

16644906432 is a wasteful number, since it uses less digits than its factorization.

16644906432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 16644906432 in words is "sixteen billion, six hundred forty-four million, nine hundred six thousand, four hundred thirty-two".