198782706880 has 28 divisors (see below), whose sum is σ = 473351321520. Its totient is φ = 79513082624.

The previous prime is 198782706853. The next prime is 198782706893. The reversal of 198782706880 is 88607287891.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 310597660 + ... + 310598299.

It is an arithmetic number, because the mean of its divisors is an integer number (16905404340).

Almost surely, 2^198782706880 is an apocalyptic number.

198782706880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198782706880 is an abundant number, since it is smaller than the sum of its proper divisors (274568614640).

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

198782706880 is an equidigital number, since it uses as much as digits as its factorization.

198782706880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621195976 (or 621195966 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 64.

The spelling of 198782706880 in words is "one hundred ninety-eight billion, seven hundred eighty-two million, seven hundred six thousand, eight hundred eighty".