53724453218 has 54 divisors (see below), whose sum is σ = 88741821249. Its totient is φ = 24387873600.

The previous prime is 53724453217. The next prime is 53724453221. The reversal of 53724453218 is 81235442735.

It can be written as a sum of positive squares in 2 ways, for example, as 49169958049 + 4554495169 = 221743^2 + 67487^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=163897.

It is a Duffinian number.

Its product of digits (806400) is a multiple of the sum of its prime factors (720).

It is not an unprimeable number, because it can be changed into a prime (53724453217) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 172747283 + ... + 172747593.

Almost surely, 2^53724453218 is an apocalyptic number.

53724453218 is a deficient number, since it is larger than the sum of its proper divisors (35017368031).

53724453218 is an equidigital number, since it uses as much as digits as its factorization.

53724453218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 361 counting only the distinct ones).

The product of its digits is 806400, while the sum is 44.

The spelling of 53724453218 in words is "fifty-three billion, seven hundred twenty-four million, four hundred fifty-three thousand, two hundred eighteen".