16601143125 has 80 divisors (see below), whose sum is σ = 33275348480. Its totient is φ = 7189560000.

The previous prime is 16601143057. The next prime is 16601143129. The reversal of 16601143125 is 52134110661.

It is a happy number.

It is not a de Polignac number, because 16601143125 - 2²⁸ = 16332707669 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16601143092 and 16601143101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16601143129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 216090 + ... + 282660.

It is an arithmetic number, because the mean of its divisors is an integer number (415941856).

Almost surely, 2^16601143125 is an apocalyptic number.

16601143125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16601143125 is an abundant number, since it is smaller than the sum of its proper divisors (16674205355).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16601143125 is an equidigital number, since it uses as much as digits as its factorization.

16601143125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66620 (or 66605 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 16601143125 its reverse (52134110661), we get a palindrome (68735253786).

The spelling of 16601143125 in words is "sixteen billion, six hundred one million, one hundred forty-three thousand, one hundred twenty-five".