16643320442 has 32 divisors (see below), whose sum is σ = 29082022272. Its totient is φ = 6995312064.

The previous prime is 16643320423. The next prime is 16643320471. The reversal of 16643320442 is 24402334661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3371408 + ... + 3376340.

It is an arithmetic number, because the mean of its divisors is an integer number (908813196).

Almost surely, 2^16643320442 is an apocalyptic number.

16643320442 is a deficient number, since it is larger than the sum of its proper divisors (12438701830).

16643320442 is a wasteful number, since it uses less digits than its factorization.

16643320442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542.

The product of its (nonzero) digits is 82944, while the sum is 35.

The spelling of 16643320442 in words is "sixteen billion, six hundred forty-three million, three hundred twenty thousand, four hundred forty-two".