189538320625 has 20 divisors (see below), whose sum is σ = 244487339008. Its totient is φ = 146739330000.

The previous prime is 189538320619. The next prime is 189538320641. The reversal of 189538320625 is 526023835981.

It is not a de Polignac number, because 189538320625 - 2¹¹ = 189538318577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4871937 + ... + 4910686.

Almost surely, 2^189538320625 is an apocalyptic number.

It is an amenable number.

189538320625 is a deficient number, since it is larger than the sum of its proper divisors (54949018383).

189538320625 is an frugal number, since it uses more digits than its factorization.

189538320625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9782674 (or 9782659 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 189538320625 in words is "one hundred eighty-nine billion, five hundred thirty-eight million, three hundred twenty thousand, six hundred twenty-five".