189408271085 has 32 divisors (see below), whose sum is σ = 263871032832. Its totient is φ = 128990202880.

The previous prime is 189408271027. The next prime is 189408271103. The reversal of 189408271085 is 580172804981.

It is not a de Polignac number, because 189408271085 - 2⁸ = 189408270829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329957 + ... + 698346.

It is an arithmetic number, because the mean of its divisors is an integer number (8245969776).

Almost surely, 2^189408271085 is an apocalyptic number.

It is an amenable number.

189408271085 is a deficient number, since it is larger than the sum of its proper divisors (74462761747).

189408271085 is a wasteful number, since it uses less digits than its factorization.

189408271085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028533.

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 189408271085 in words is "one hundred eighty-nine billion, four hundred eight million, two hundred seventy-one thousand, eighty-five".