189981206496 has 144 divisors (see below), whose sum is σ = 590492343168. Its totient is φ = 57679257600.

The previous prime is 189981206461. The next prime is 189981206497. The reversal of 189981206496 is 694602189981.

189981206496 is a `hidden beast` number, since 18 + 9 + 9 + 8 + 120 + 6 + 496 = 666.

189981206496 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 (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189981206497) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 474085 + ... + 777636.

It is an arithmetic number, because the mean of its divisors is an integer number (4100641272).

Almost surely, 2^189981206496 is an apocalyptic number.

189981206496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

189981206496 is an abundant number, since it is smaller than the sum of its proper divisors (400511136672).

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

189981206496 is a wasteful number, since it uses less digits than its factorization.

189981206496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251785 (or 1251774 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 63.

The spelling of 189981206496 in words is "one hundred eighty-nine billion, nine hundred eighty-one million, two hundred six thousand, four hundred ninety-six".