545638480 has 80 divisors (see below), whose sum is σ = 1317772800. Its totient is φ = 209861120.

The previous prime is 545638459. The next prime is 545638487. The reversal of 545638480 is 84836545.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545638487) 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, 1111035 + ... + 1111525.

It is an arithmetic number, because the mean of its divisors is an integer number (16472160).

Almost surely, 2^545638480 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 545638480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658886400).

545638480 is an abundant number, since it is smaller than the sum of its proper divisors (772134320).

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

545638480 is a wasteful number, since it uses less digits than its factorization.

545638480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The square root of 545638480 is about 23358.9057962911. The cubic root of 545638480 is about 817.1497712657.

The spelling of 545638480 in words is "five hundred forty-five million, six hundred thirty-eight thousand, four hundred eighty".