189989511901 has 16 divisors (see below), whose sum is σ = 223040439424. Its totient is φ = 158417601984.

The previous prime is 189989511889. The next prime is 189989511937. The reversal of 189989511901 is 109115989981.

189989511901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 189989511901 - 2¹³ = 189989503709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189989511901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189989511991) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1399246 + ... + 1529008.

It is an arithmetic number, because the mean of its divisors is an integer number (13940027464).

Almost surely, 2^189989511901 is an apocalyptic number.

It is an amenable number.

189989511901 is a deficient number, since it is larger than the sum of its proper divisors (33050927523).

189989511901 is a wasteful number, since it uses less digits than its factorization.

189989511901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135460.

The product of its (nonzero) digits is 2099520, while the sum is 61.

The spelling of 189989511901 in words is "one hundred eighty-nine billion, nine hundred eighty-nine million, five hundred eleven thousand, nine hundred one".