189787774848 has 64 divisors (see below), whose sum is σ = 576141467520. Its totient is φ = 54225077760.

The previous prime is 189787774829. The next prime is 189787774849. The reversal of 189787774848 is 848477787981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189787774849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35300098 + ... + 35305473.

It is an arithmetic number, because the mean of its divisors is an integer number (9002210430).

Almost surely, 2^189787774848 is an apocalyptic number.

It is an amenable number.

189787774848 is an abundant number, since it is smaller than the sum of its proper divisors (386353692672).

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

189787774848 is an equidigital number, since it uses as much as digits as its factorization.

189787774848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70605595 (or 70605583 counting only the distinct ones).

The product of its digits is 1416167424, while the sum is 78.

The spelling of 189787774848 in words is "one hundred eighty-nine billion, seven hundred eighty-seven million, seven hundred seventy-four thousand, eight hundred forty-eight".