188630647328 has 18 divisors (see below), whose sum is σ = 371371423941. Its totient is φ = 94314095232.

The previous prime is 188630647229. The next prime is 188630647357. The reversal of 188630647328 is 823746036881.

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 158572796944 + 30057850384 = 398212^2 + 173372^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=307108.

It is a super-2 number, since 2×188630647328² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2418476 + ... + 2495252.

Almost surely, 2^188630647328 is an apocalyptic number.

It is an amenable number.

188630647328 is a deficient number, since it is larger than the sum of its proper divisors (182740776613).

188630647328 is an frugal number, since it uses more digits than its factorization.

188630647328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153564 (or 76779 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 188630647328 in words is "one hundred eighty-eight billion, six hundred thirty million, six hundred forty-seven thousand, three hundred twenty-eight".