16561441824308 has 12 divisors (see below), whose sum is σ = 28982638434372. Its totient is φ = 8280687985920.

The previous prime is 16561441824307. The next prime is 16561441824371. The reversal of 16561441824308 is 80342814416561.

It can be written as a sum of positive squares in 2 ways, for example, as 2184164763664 + 14377277060644 = 1477892^2 + 3791738^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16561441824308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16561441824307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7082003 + ... + 9125658.

It is an arithmetic number, because the mean of its divisors is an integer number (2415219869531).

Almost surely, 2^{16561441824308} is an apocalyptic number.

It is an amenable number.

16561441824308 is a deficient number, since it is larger than the sum of its proper divisors (12421196610064).

16561441824308 is a wasteful number, since it uses less digits than its factorization.

16561441824308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16463122 (or 16463120 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 53.

The spelling of 16561441824308 in words is "sixteen trillion, five hundred sixty-one billion, four hundred forty-one million, eight hundred twenty-four thousand, three hundred eight".