654785672 has 36 divisors (see below), whose sum is σ = 1254198645. Its totient is φ = 320480928.

The previous prime is 654785669. The next prime is 654785683. The reversal of 654785672 is 276587456.

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 628304356 + 26481316 = 25066^2 + 5146^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18094.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 654785672.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6007154 + ... + 6007262.

Almost surely, 2^654785672 is an apocalyptic number.

It is an amenable number.

654785672 is a deficient number, since it is larger than the sum of its proper divisors (599412973).

654785672 is an equidigital number, since it uses as much as digits as its factorization.

654785672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 194 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 50.

The square root of 654785672 is about 25588.7801975788. The cubic root of 654785672 is about 868.3598251904.

Multiplying 654785672 by its sum of digits (50), we get a square (32739283600 = 180940²).

The spelling of 654785672 in words is "six hundred fifty-four million, seven hundred eighty-five thousand, six hundred seventy-two".