16545520231120 has 20 divisors (see below), whose sum is σ = 38468334537540. Its totient is φ = 6618208092416.

The previous prime is 16545520231109. The next prime is 16545520231127. The reversal of 16545520231120 is 2113202554561.

It can be written as a sum of positive squares in 2 ways, for example, as 3675134380096 + 12870385851024 = 1917064^2 + 3587532^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 16545520231120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545520231127) 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, 103409501365 + ... + 103409501524.

It is an arithmetic number, because the mean of its divisors is an integer number (1923416726877).

Almost surely, 2^{16545520231120} is an apocalyptic number.

16545520231120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16545520231120 is an abundant number, since it is smaller than the sum of its proper divisors (21922814306420).

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

16545520231120 is a wasteful number, since it uses less digits than its factorization.

16545520231120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206819002902 (or 206819002896 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 16545520231120 its reverse (2113202554561), we get a palindrome (18658722785681).

The spelling of 16545520231120 in words is "sixteen trillion, five hundred forty-five billion, five hundred twenty million, two hundred thirty-one thousand, one hundred twenty".