189843634512 has 120 divisors (see below), whose sum is σ = 619590254400. Its totient is φ = 54241024320.

The previous prime is 189843634511. The next prime is 189843634531. The reversal of 189843634512 is 215436348981.

It is a happy number.

189843634512 is a `hidden beast` number, since 1 + 8 + 98 + 4 + 3 + 6 + 34 + 512 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189843634511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1872414 + ... + 1971197.

It is an arithmetic number, because the mean of its divisors is an integer number (5163252120).

Almost surely, 2^189843634512 is an apocalyptic number.

189843634512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189843634512 is an abundant number, since it is smaller than the sum of its proper divisors (429746619888).

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

189843634512 is a wasteful number, since it uses less digits than its factorization.

189843634512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843646 (or 3843623 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 189843634512 in words is "one hundred eighty-nine billion, eight hundred forty-three million, six hundred thirty-four thousand, five hundred twelve".