53440585728 has 112 divisors (see below), whose sum is σ = 142747044960. Its totient is φ = 17782603776.

The previous prime is 53440585711. The next prime is 53440585741. The reversal of 53440585728 is 82758504435.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17422851 + ... + 17425917.

Almost surely, 2^53440585728 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 53440585728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71373522480).

53440585728 is an abundant number, since it is smaller than the sum of its proper divisors (89306459232).

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

53440585728 is an equidigital number, since it uses as much as digits as its factorization.

53440585728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805 (or 3781 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 51.

The spelling of 53440585728 in words is "fifty-three billion, four hundred forty million, five hundred eighty-five thousand, seven hundred twenty-eight".