198782821260 has 72 divisors (see below), whose sum is σ = 611974215216. Its totient is φ = 52217573760.

The previous prime is 198782821249. The next prime is 198782821283. The reversal of 198782821260 is 62128287891.

It is a super-2 number, since 2×198782821260² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198782821197 and 198782821206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8229351 + ... + 8253470.

It is an arithmetic number, because the mean of its divisors is an integer number (8499641878).

Almost surely, 2^198782821260 is an apocalyptic number.

198782821260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198782821260 is an abundant number, since it is smaller than the sum of its proper divisors (413191393956).

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

198782821260 is a wasteful number, since it uses less digits than its factorization.

198782821260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16482903 (or 16482898 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 198782821260 in words is "one hundred ninety-eight billion, seven hundred eighty-two million, eight hundred twenty-one thousand, two hundred sixty".