545688648 has 36 divisors (see below), whose sum is σ = 1478443785. Its totient is φ = 181830144.

The previous prime is 545688643. The next prime is 545688697. The reversal of 545688648 is 846886545.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 412008804 + 133679844 = 20298^2 + 11562^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=16518.

It is a super-2 number, since 2×545688648² = 595552201112135808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 545688594 and 545688603.

It is not an unprimeable number, because it can be changed into a prime (545688641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 196840 + ... + 199592.

Almost surely, 2^545688648 is an apocalyptic number.

It is an amenable number.

545688648 is an abundant number, since it is smaller than the sum of its proper divisors (932755137).

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

545688648 is an equidigital number, since it uses as much as digits as its factorization.

545688648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518 (or 2758 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 54.

The square root of 545688648 is about 23359.9796232788. The cubic root of 545688648 is about 817.1748144124.

The spelling of 545688648 in words is "five hundred forty-five million, six hundred eighty-eight thousand, six hundred forty-eight".