189834386652 has 144 divisors (see below), whose sum is σ = 521949675520. Its totient is φ = 57953750400.

The previous prime is 189834386647. The next prime is 189834386653. The reversal of 189834386652 is 256683438981.

It is a happy number.

189834386652 is a `hidden beast` number, since 1 + 8 + 98 + 3 + 438 + 66 + 52 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 189834386652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189834386653) 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, 23171877 + ... + 23180067.

Almost surely, 2^189834386652 is an apocalyptic number.

189834386652 is a gapful number since it is divisible by the number (12) 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 189834386652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260974837760).

189834386652 is an abundant number, since it is smaller than the sum of its proper divisors (332115288868).

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

189834386652 is a wasteful number, since it uses less digits than its factorization.

189834386652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9344 (or 9339 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 189834386652 in words is "one hundred eighty-nine billion, eight hundred thirty-four million, three hundred eighty-six thousand, six hundred fifty-two".