16545776032121 has 8 divisors (see below), whose sum is σ = 18909499638720. Its totient is φ = 14182062754608.

The previous prime is 16545776032087. The next prime is 16545776032129. The reversal of 16545776032121 is 12123067754561.

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-16545776032121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16545776032121.

It is not an unprimeable number, because it can be changed into a prime (16545776032129) by changing a digit.

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, 1224410 + ... + 5881388.

It is an arithmetic number, because the mean of its divisors is an integer number (2363687454840).

Almost surely, 2^{16545776032121} is an apocalyptic number.

It is an amenable number.

16545776032121 is a deficient number, since it is larger than the sum of its proper divisors (2363723606599).

16545776032121 is an equidigital number, since it uses as much as digits as its factorization.

16545776032121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164543.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 16545776032121 in words is "sixteen trillion, five hundred forty-five billion, seven hundred seventy-six million, thirty-two thousand, one hundred twenty-one".