189408128158 has 8 divisors (see below), whose sum is σ = 293277101760. Its totient is φ = 91649094240.

The previous prime is 189408128137. The next prime is 189408128179. The reversal of 189408128158 is 851821804981.

189408128158 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189408128137) and next prime (189408128179).

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

It is a junction number, because it is equal to n+sod(n) for n = 189408128099 and 189408128108.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1527484843 + ... + 1527484966.

It is an arithmetic number, because the mean of its divisors is an integer number (36659637720).

Almost surely, 2^189408128158 is an apocalyptic number.

189408128158 is a deficient number, since it is larger than the sum of its proper divisors (103868973602).

189408128158 is a wasteful number, since it uses less digits than its factorization.

189408128158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054969842.

The product of its (nonzero) digits is 1474560, while the sum is 55.

The spelling of 189408128158 in words is "one hundred eighty-nine billion, four hundred eight million, one hundred twenty-eight thousand, one hundred fifty-eight".