16545776522500 has 45 divisors (see below), whose sum is σ = 36182748861721. Its totient is φ = 6618229256000.

The previous prime is 16545776522477. The next prime is 16545776522519. The reversal of 16545776522500 is 522567754561.

The square root of 16545776522500 is 4067650.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 7939579811076 + 8606196711424 = 2817726^2 + 2933632^2 .

It is a Duffinian number.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 203341824 + ... + 203423176.

Almost surely, 2^{16545776522500} is an apocalyptic number.

16545776522500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16545776522500 is the 4067650-th square number.

It is an amenable number.

16545776522500 is an abundant number, since it is smaller than the sum of its proper divisors (19636972339221).

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

16545776522500 is an frugal number, since it uses more digits than its factorization.

16545776522500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162730 (or 81360 counting only the distinct ones).

The product of its (nonzero) digits is 17640000, while the sum is 55.

The spelling of 16545776522500 in words is "sixteen trillion, five hundred forty-five billion, seven hundred seventy-six million, five hundred twenty-two thousand, five hundred".