16545120539020 has 24 divisors (see below), whose sum is σ = 34744989709584. Its totient is φ = 6618003153216.

The previous prime is 16545120538951. The next prime is 16545120539021. The reversal of 16545120539020 is 2093502154561.

It is not an unprimeable number, because it can be changed into a prime (16545120539021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277194 + ... + 5759086.

It is an arithmetic number, because the mean of its divisors is an integer number (1447707904566).

Almost surely, 2^{16545120539020} is an apocalyptic number.

16545120539020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16545120539020 is an abundant number, since it is smaller than the sum of its proper divisors (18199869170564).

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

16545120539020 is a wasteful number, since it uses less digits than its factorization.

16545120539020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5632809 (or 5632807 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 16545120539020 in words is "sixteen trillion, five hundred forty-five billion, one hundred twenty million, five hundred thirty-nine thousand, twenty".