229755721728 has 192 divisors, whose sum is σ = 663592456800. Its totient is φ = 70689914880.

The previous prime is 229755721673. The next prime is 229755721729. The reversal of 229755721728 is 827127557922.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229755721729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13489858 + ... + 13506878.

Almost surely, 2^229755721728 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 229755721728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331796228400).

229755721728 is an abundant number, since it is smaller than the sum of its proper divisors (433836735072).

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

229755721728 is an equidigital number, since it uses as much as digits as its factorization.

229755721728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17085 (or 17039 counting only the distinct ones).

The product of its digits is 9878400, while the sum is 57.

The spelling of 229755721728 in words is "two hundred twenty-nine billion, seven hundred fifty-five million, seven hundred twenty-one thousand, seven hundred twenty-eight".