16643132432 has 40 divisors (see below), whose sum is σ = 32672428920. Its totient is φ = 8211906560.

The previous prime is 16643132423. The next prime is 16643132437. The reversal of 16643132432 is 23423134661.

It can be written as a sum of positive squares in 4 ways, for example, as 2012778496 + 14630353936 = 44864^2 + 120956^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16643132392 and 16643132401.

It is not an unprimeable number, because it can be changed into a prime (16643132437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730688 + ... + 753120.

It is an arithmetic number, because the mean of its divisors is an integer number (816810723).

Almost surely, 2^16643132432 is an apocalyptic number.

It is an amenable number.

16643132432 is a deficient number, since it is larger than the sum of its proper divisors (16029296488).

16643132432 is a wasteful number, since it uses less digits than its factorization.

16643132432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23051 (or 23045 counting only the distinct ones).

The product of its digits is 62208, while the sum is 35.

The spelling of 16643132432 in words is "sixteen billion, six hundred forty-three million, one hundred thirty-two thousand, four hundred thirty-two".