199327788980 has 24 divisors (see below), whose sum is σ = 429901557288. Its totient is φ = 77576220288.

The previous prime is 199327788941. The next prime is 199327788983. The reversal of 199327788980 is 89887723991.

It can be written as a sum of positive squares in 4 ways, for example, as 16969751824 + 182358037156 = 130268^2 + 427034^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199327788983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134680199 + ... + 134681678.

It is an arithmetic number, because the mean of its divisors is an integer number (17912564887).

Almost surely, 2^199327788980 is an apocalyptic number.

199327788980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199327788980 is an abundant number, since it is smaller than the sum of its proper divisors (230573768308).

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

199327788980 is a wasteful number, since it uses less digits than its factorization.

199327788980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269361923 (or 269361921 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 71.

The spelling of 199327788980 in words is "one hundred ninety-nine billion, three hundred twenty-seven million, seven hundred eighty-eight thousand, nine hundred eighty".