545805216 has 192 divisors, whose sum is σ = 1760572800. Its totient is φ = 165162240.

The previous prime is 545805209. The next prime is 545805217. The reversal of 545805216 is 612508545.

545805216 is a `hidden beast` number, since 54 + 5 + 80 + 521 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (545805217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 769470 + ... + 770178.

It is an arithmetic number, because the mean of its divisors is an integer number (9169650).

Almost surely, 2^545805216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545805216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880286400).

545805216 is an abundant number, since it is smaller than the sum of its proper divisors (1214767584).

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

545805216 is an equidigital number, since it uses as much as digits as its factorization.

545805216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 545805216 is about 23362.4745264709. The cubic root of 545805216 is about 817.2329975614.

The spelling of 545805216 in words is "five hundred forty-five million, eight hundred five thousand, two hundred sixteen".