189599969860 has 144 divisors (see below), whose sum is σ = 483485345280. Its totient is φ = 62201018880.

The previous prime is 189599969857. The next prime is 189599969861. The reversal of 189599969860 is 68969995981.

It is not an unprimeable number, because it can be changed into a prime (189599969861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2668759 + ... + 2738881.

It is an arithmetic number, because the mean of its divisors is an integer number (3357537120).

Almost surely, 2^189599969860 is an apocalyptic number.

189599969860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189599969860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241742672640).

189599969860 is an abundant number, since it is smaller than the sum of its proper divisors (293885375420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189599969860 is a wasteful number, since it uses less digits than its factorization.

189599969860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70266 (or 70257 counting only the distinct ones).

The product of its (nonzero) digits is 680244480, while the sum is 79.

The spelling of 189599969860 in words is "one hundred eighty-nine billion, five hundred ninety-nine million, nine hundred sixty-nine thousand, eight hundred sixty".