1980787216 has 10 divisors (see below), whose sum is σ = 3837775262. Its totient is φ = 990393600.

The previous prime is 1980787213. The next prime is 1980787313. The reversal of 1980787216 is 6127870891.

It can be written as a sum of positive squares in only one way, i.e., 1289097216 + 691690000 = 35904^2 + 26300^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1980787216.

It is not an unprimeable number, because it can be changed into a prime (1980787213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61899585 + ... + 61899616.

Almost surely, 2^1980787216 is an apocalyptic number.

1980787216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1980787216 is a deficient number, since it is larger than the sum of its proper divisors (1856988046).

1980787216 is a wasteful number, since it uses less digits than its factorization.

1980787216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123799209 (or 123799203 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 49.

The square root of 1980787216 is about 44506.0357255058. The cubic root of 1980787216 is about 1255.8736298948.

The spelling of 1980787216 in words is "one billion, nine hundred eighty million, seven hundred eighty-seven thousand, two hundred sixteen".