189058866481 has 9 divisors (see below), whose sum is σ = 200842011649. Its totient is φ = 177930799744.

The previous prime is 189058866473. The next prime is 189058866487. The reversal of 189058866481 is 184668850981.

The square root of 189058866481 is 434809.

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

It can be written as a sum of positive squares in 4 ways, for example, as 15069772081 + 173989094400 = 122759^2 + 417120^2 .

It is not a de Polignac number, because 189058866481 - 2³ = 189058866473 is a prime.

It is a super-2 number, since 2×189058866481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189058866487) 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, 7378965 + ... + 7404541.

Almost surely, 2^189058866481 is an apocalyptic number.

189058866481 is the 434809-th square number.

189058866481 is the 217405-th centered octagonal number.

It is an amenable number.

189058866481 is a deficient number, since it is larger than the sum of its proper divisors (11783145168).

189058866481 is an frugal number, since it uses more digits than its factorization.

189058866481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51188 (or 25594 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 64.

Multiplying 189058866481 by its sum of digits (64), we get a square (12099767454784 = 3478472²).

The spelling of 189058866481 in words is "one hundred eighty-nine billion, fifty-eight million, eight hundred sixty-six thousand, four hundred eighty-one".