2009116780 has 48 divisors (see below), whose sum is σ = 4873460256. Its totient is φ = 687610880.

The previous prime is 2009116751. The next prime is 2009116783. The reversal of 2009116780 is 876119002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (2009116783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264859 + ... + 272338.

It is an arithmetic number, because the mean of its divisors is an integer number (101530422).

Almost surely, 2^2009116780 is an apocalyptic number.

2009116780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2009116780 is an abundant number, since it is smaller than the sum of its proper divisors (2864343476).

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

2009116780 is a wasteful number, since it uses less digits than its factorization.

2009116780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537234 (or 537232 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 2009116780 is about 44823.1723553789. The cubic root of 2009116780 is about 1261.8325522109.

The spelling of 2009116780 in words is "two billion, nine million, one hundred sixteen thousand, seven hundred eighty".