189638475625 has 15 divisors (see below), whose sum is σ = 236985844161. Its totient is φ = 151702071000.

The previous prime is 189638475583. The next prime is 189638475641. The reversal of 189638475625 is 526574836981.

The square root of 189638475625 is 435475.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 14867656489 + 174770819136 = 121933^2 + 418056^2 .

It is not a de Polignac number, because 189638475625 - 2⁹ = 189638475113 is a prime.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 10878166 + ... + 10895584.

Almost surely, 2^189638475625 is an apocalyptic number.

189638475625 is the 435475-th square number.

189638475625 is the 217738-th centered octagonal number.

It is an amenable number.

189638475625 is a deficient number, since it is larger than the sum of its proper divisors (47347368536).

189638475625 is an frugal number, since it uses more digits than its factorization.

189638475625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34858 (or 17424 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 64.

Multiplying 189638475625 by its sum of digits (64), we get a square (12136862440000 = 3483800²).

The spelling of 189638475625 in words is "one hundred eighty-nine billion, six hundred thirty-eight million, four hundred seventy-five thousand, six hundred twenty-five".