16001660442800 has 30 divisors (see below), whose sum is σ = 38443989214788. Its totient is φ = 6400664176960.

The previous prime is 16001660442797. The next prime is 16001660442811. The reversal of 16001660442800 is 824406610061.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20002075154 + ... + 20002075953.

Almost surely, 2^{16001660442800} is an apocalyptic number.

16001660442800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16001660442800 is an abundant number, since it is smaller than the sum of its proper divisors (22442328771988).

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

16001660442800 is a wasteful number, since it uses less digits than its factorization.

16001660442800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40004151125 (or 40004151114 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 16001660442800 in words is "sixteen trillion, one billion, six hundred sixty million, four hundred forty-two thousand, eight hundred".