189982637789 has 8 divisors (see below), whose sum is σ = 224610015360. Its totient is φ = 157227010416.

The previous prime is 189982637723. The next prime is 189982637837. The reversal of 189982637789 is 987736289981.

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

It is not a de Polignac number, because 189982637789 - 2²⁸ = 189714202333 is a prime.

It is a super-2 number, since 2×189982637789² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189982637389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467937329 + ... + 467937734.

It is an arithmetic number, because the mean of its divisors is an integer number (28076251920).

Almost surely, 2^189982637789 is an apocalyptic number.

It is an amenable number.

189982637789 is a deficient number, since it is larger than the sum of its proper divisors (34627377571).

189982637789 is an equidigital number, since it uses as much as digits as its factorization.

189982637789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935875099.

The product of its digits is 658409472, while the sum is 77.

The spelling of 189982637789 in words is "one hundred eighty-nine billion, nine hundred eighty-two million, six hundred thirty-seven thousand, seven hundred eighty-nine".