189771470155 has 8 divisors (see below), whose sum is σ = 237626884512. Its totient is φ = 145216429248.

The previous prime is 189771470149. The next prime is 189771470167. The reversal of 189771470155 is 551074177981.

189771470155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189771470155 - 2¹⁷ = 189771339083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189771470096 and 189771470105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825093234 + ... + 825093463.

It is an arithmetic number, because the mean of its divisors is an integer number (29703360564).

Almost surely, 2^189771470155 is an apocalyptic number.

189771470155 is a deficient number, since it is larger than the sum of its proper divisors (47855414357).

189771470155 is a wasteful number, since it uses less digits than its factorization.

189771470155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650186725.

The product of its (nonzero) digits is 2469600, while the sum is 55.

The spelling of 189771470155 in words is "one hundred eighty-nine billion, seven hundred seventy-one million, four hundred seventy thousand, one hundred fifty-five".