188994685847 has 4 divisors (see below), whose sum is σ = 206176020936. Its totient is φ = 171813350760.

The previous prime is 188994685823. The next prime is 188994685849. The reversal of 188994685847 is 748586499881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188994685847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188994685849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8590667528 + ... + 8590667549.

It is an arithmetic number, because the mean of its divisors is an integer number (51544005234).

Almost surely, 2^188994685847 is an apocalyptic number.

188994685847 is a deficient number, since it is larger than the sum of its proper divisors (17181335089).

188994685847 is a wasteful number, since it uses less digits than its factorization.

188994685847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17181335088.

The product of its digits is 1114767360, while the sum is 77.

The spelling of 188994685847 in words is "one hundred eighty-eight billion, nine hundred ninety-four million, six hundred eighty-five thousand, eight hundred forty-seven".