199201581980 has 96 divisors (see below), whose sum is σ = 441304367616. Its totient is φ = 75448302336.

The previous prime is 199201581967. The next prime is 199201581983. The reversal of 199201581980 is 89185102991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199201581983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4090937 + ... + 4139343.

It is an arithmetic number, because the mean of its divisors is an integer number (4596920496).

Almost surely, 2^199201581980 is an apocalyptic number.

199201581980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199201581980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220652183808).

199201581980 is an abundant number, since it is smaller than the sum of its proper divisors (242102785636).

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

199201581980 is a wasteful number, since it uses less digits than its factorization.

199201581980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48603 (or 48601 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 53.

The spelling of 199201581980 in words is "one hundred ninety-nine billion, two hundred one million, five hundred eighty-one thousand, nine hundred eighty".