2009779416 has 72 divisors (see below), whose sum is σ = 5744786580. Its totient is φ = 634658976.

The previous prime is 2009779393. The next prime is 2009779417. The reversal of 2009779416 is 6149779002.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009779417) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12670 + ... + 64653.

Almost surely, 2^2009779416 is an apocalyptic number.

It is an amenable number.

2009779416 is an abundant number, since it is smaller than the sum of its proper divisors (3735007164).

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

2009779416 is a wasteful number, since it uses less digits than its factorization.

2009779416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77373 (or 77347 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 2009779416 is about 44830.5634138140. The cubic root of 2009779416 is about 1261.9712605523.

The spelling of 2009779416 in words is "two billion, nine million, seven hundred seventy-nine thousand, four hundred sixteen".