189116785 has 32 divisors (see below), whose sum is σ = 280667520. Its totient is φ = 120268800.

The previous prime is 189116783. The next prime is 189116803. The reversal of 189116785 is 587611981.

189116785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189116785 - 2¹ = 189116783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189116783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6625 + ... + 20545.

It is an arithmetic number, because the mean of its divisors is an integer number (8770860).

Almost surely, 2^189116785 is an apocalyptic number.

It is an amenable number.

189116785 is a deficient number, since it is larger than the sum of its proper divisors (91550735).

189116785 is a wasteful number, since it uses less digits than its factorization.

189116785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13969.

The product of its digits is 120960, while the sum is 46.

The square root of 189116785 is about 13751.9738583230. The cubic root of 189116785 is about 573.9975324349.

The spelling of 189116785 in words is "one hundred eighty-nine million, one hundred sixteen thousand, seven hundred eighty-five".