545503640 has 64 divisors (see below), whose sum is σ = 1346181120. Its totient is φ = 197296000.

The previous prime is 545503631. The next prime is 545503643. The reversal of 545503640 is 46305545.

It is a junction number, because it is equal to n+sod(n) for n = 545503597 and 545503606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545503643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80795 + ... + 87285.

It is an arithmetic number, because the mean of its divisors is an integer number (21034080).

Almost surely, 2^545503640 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 545503640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673090560).

545503640 is an abundant number, since it is smaller than the sum of its proper divisors (800677480).

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

545503640 is a wasteful number, since it uses less digits than its factorization.

545503640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704 (or 6700 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 545503640 is about 23356.0193526209. The cubic root of 545503640 is about 817.0824534617.

The spelling of 545503640 in words is "five hundred forty-five million, five hundred three thousand, six hundred forty".