189343640000 has 70 divisors (see below), whose sum is σ = 469510789704. Its totient is φ = 75737440000.

The previous prime is 189343639997. The next prime is 189343640011. The reversal of 189343640000 is 46343981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2326796 + ... + 2406795.

Almost surely, 2^189343640000 is an apocalyptic number.

189343640000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189343640000 is an abundant number, since it is smaller than the sum of its proper divisors (280167149704).

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

189343640000 is an frugal number, since it uses more digits than its factorization.

189343640000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4733623 (or 4733598 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

Adding to 189343640000 its reverse (46343981), we get a palindrome (189389983981).

The spelling of 189343640000 in words is "one hundred eighty-nine billion, three hundred forty-three million, six hundred forty thousand".