1980109768 has 64 divisors (see below), whose sum is σ = 4590351360. Its totient is φ = 779763456.

The previous prime is 1980109753. The next prime is 1980109811. The reversal of 1980109768 is 8679010891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156246 + ... + 168442.

It is an arithmetic number, because the mean of its divisors is an integer number (71724240).

Almost surely, 2^1980109768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980109768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2295175680).

1980109768 is an abundant number, since it is smaller than the sum of its proper divisors (2610241592).

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

1980109768 is a wasteful number, since it uses less digits than its factorization.

1980109768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12446 (or 12442 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 1980109768 is about 44498.4243316547. The cubic root of 1980109768 is about 1255.7304400083.

The spelling of 1980109768 in words is "one billion, nine hundred eighty million, one hundred nine thousand, seven hundred sixty-eight".