2781081416 has 32 divisors (see below), whose sum is σ = 5342055840. Its totient is φ = 1356609408.

The previous prime is 2781081397. The next prime is 2781081419. The reversal of 2781081416 is 6141801872.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2781081416.

It is not an unprimeable number, because it can be changed into a prime (2781081419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321500 + ... + 330036.

It is an arithmetic number, because the mean of its divisors is an integer number (166939245).

Almost surely, 2^2781081416 is an apocalyptic number.

It is an amenable number.

2781081416 is a deficient number, since it is larger than the sum of its proper divisors (2560974424).

2781081416 is a wasteful number, since it uses less digits than its factorization.

2781081416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9533 (or 9529 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 2781081416 is about 52735.9594204941. The cubic root of 2781081416 is about 1406.2781673344.

The spelling of 2781081416 in words is "two billion, seven hundred eighty-one million, eighty-one thousand, four hundred sixteen".