189998766320 has 40 divisors (see below), whose sum is σ = 481905964080. Its totient is φ = 69090460160.

The previous prime is 189998766283. The next prime is 189998766359. The reversal of 189998766320 is 23667899981.

189998766320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107952965 + ... + 107954724.

It is an arithmetic number, because the mean of its divisors is an integer number (12047649102).

Almost surely, 2^189998766320 is an apocalyptic number.

189998766320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189998766320 is an abundant number, since it is smaller than the sum of its proper divisors (291907197760).

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

189998766320 is a wasteful number, since it uses less digits than its factorization.

189998766320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215907713 (or 215907707 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 68.

The spelling of 189998766320 in words is "one hundred eighty-nine billion, nine hundred ninety-eight million, seven hundred sixty-six thousand, three hundred twenty".