16545655437121 has 8 divisors (see below), whose sum is σ = 16720386830504. Its totient is φ = 16371008893440.

The previous prime is 16545655437041. The next prime is 16545655437217. The reversal of 16545655437121 is 12173455654561.

16545655437121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1189602494721 + 15356052942400 = 1090689^2 + 3918680^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16545655437121 - 2¹⁵ = 16545655404353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545659437121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20820330 + ... + 21600403.

It is an arithmetic number, because the mean of its divisors is an integer number (2090048353813).

Almost surely, 2^{16545655437121} is an apocalyptic number.

It is an amenable number.

16545655437121 is a deficient number, since it is larger than the sum of its proper divisors (174731393383).

16545655437121 is an equidigital number, since it uses as much as digits as its factorization.

16545655437121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42424851.

The product of its digits is 15120000, while the sum is 55.

The spelling of 16545655437121 in words is "sixteen trillion, five hundred forty-five billion, six hundred fifty-five million, four hundred thirty-seven thousand, one hundred twenty-one".