189041474521 has 9 divisors (see below), whose sum is σ = 190552967733. Its totient is φ = 187541887260.

The previous prime is 189041474519. The next prime is 189041474537. The reversal of 189041474521 is 125474140981.

The square root of 189041474521 is 434789.

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

It is not a de Polignac number, because 189041474521 - 2¹ = 189041474519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189041474561) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 56955700 + ... + 56959018.

Almost surely, 2^189041474521 is an apocalyptic number.

189041474521 is the 434789-th square number.

189041474521 is the 217395-th centered octagonal number.

It is an amenable number.

189041474521 is a deficient number, since it is larger than the sum of its proper divisors (1511493212).

189041474521 is an frugal number, since it uses more digits than its factorization.

189041474521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900 (or 3450 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 189041474521 in words is "one hundred eighty-nine billion, forty-one million, four hundred seventy-four thousand, five hundred twenty-one".