16561660060055 has 8 divisors (see below), whose sum is σ = 21680718624144. Its totient is φ = 12044843680000.

The previous prime is 16561660060027. The next prime is 16561660060091. The reversal of 16561660060055 is 55006006616561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-16561660060055 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16561660059991 and 16561660060009.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150560545946 + ... + 150560546055.

It is an arithmetic number, because the mean of its divisors is an integer number (2710089828018).

Almost surely, 2^{16561660060055} is an apocalyptic number.

16561660060055 is a deficient number, since it is larger than the sum of its proper divisors (5119058564089).

16561660060055 is a wasteful number, since it uses less digits than its factorization.

16561660060055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301121092017.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 16561660060055 in words is "sixteen trillion, five hundred sixty-one billion, six hundred sixty million, sixty thousand, fifty-five".