16001942805844 has 12 divisors (see below), whose sum is σ = 28969034390100. Its totient is φ = 7725075837248.

The previous prime is 16001942805781. The next prime is 16001942805911. The reversal of 16001942805844 is 44850824910061.

It can be written as a sum of positive squares in 2 ways, for example, as 3278953180944 + 12722989624900 = 1810788^2 + 3566930^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16001942805791 and 16001942805800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68973891289 + ... + 68973891520.

It is an arithmetic number, because the mean of its divisors is an integer number (2414086199175).

Almost surely, 2^{16001942805844} is an apocalyptic number.

It is an amenable number.

16001942805844 is a deficient number, since it is larger than the sum of its proper divisors (12967091584256).

16001942805844 is a wasteful number, since it uses less digits than its factorization.

16001942805844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137947782842 (or 137947782840 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 16001942805844 in words is "sixteen trillion, one billion, nine hundred forty-two million, eight hundred five thousand, eight hundred forty-four".