653216538 has 16 divisors (see below), whose sum is σ = 1406928096. Its totient is φ = 200989680.

The previous prime is 653216521. The next prime is 653216549. The reversal of 653216538 is 835612356.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 653216496 and 653216505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4187208 + ... + 4187363.

It is an arithmetic number, because the mean of its divisors is an integer number (87933006).

Almost surely, 2^653216538 is an apocalyptic number.

653216538 is an abundant number, since it is smaller than the sum of its proper divisors (753711558).

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

653216538 is a wasteful number, since it uses less digits than its factorization.

653216538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8374589.

The product of its digits is 129600, while the sum is 39.

The square root of 653216538 is about 25558.1012205524. The cubic root of 653216538 is about 867.6656220525.

The spelling of 653216538 in words is "six hundred fifty-three million, two hundred sixteen thousand, five hundred thirty-eight".