545515020 has 96 divisors (see below), whose sum is σ = 1700697600. Its totient is φ = 145167552.

The previous prime is 545515007. The next prime is 545515021. The reversal of 545515020 is 20515545.

545515020 is a `hidden beast` number, since 545 + 51 + 50 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (545515021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 398377 + ... + 399743.

It is an arithmetic number, because the mean of its divisors is an integer number (17715600).

Almost surely, 2^545515020 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 545515020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850348800).

545515020 is an abundant number, since it is smaller than the sum of its proper divisors (1155182580).

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

545515020 is a wasteful number, since it uses less digits than its factorization.

545515020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 545515020 is about 23356.2629716314. The cubic root of 545515020 is about 817.0881352653.

The spelling of 545515020 in words is "five hundred forty-five million, five hundred fifteen thousand, twenty".