2781084549 has 16 divisors (see below), whose sum is σ = 3947140800. Its totient is φ = 1736735616.

The previous prime is 2781084541. The next prime is 2781084589. The reversal of 2781084549 is 9454801872.

It is a happy number.

It is not a de Polignac number, because 2781084549 - 2³ = 2781084541 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2781084498 and 2781084507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781084541) 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, 269034 + ... + 279179.

It is an arithmetic number, because the mean of its divisors is an integer number (246696300).

Almost surely, 2^2781084549 is an apocalyptic number.

It is an amenable number.

2781084549 is a deficient number, since it is larger than the sum of its proper divisors (1166056251).

2781084549 is a wasteful number, since it uses less digits than its factorization.

2781084549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548324.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 2781084549 is about 52735.9891250747. The cubic root of 2781084549 is about 1406.2786954105.

The spelling of 2781084549 in words is "two billion, seven hundred eighty-one million, eighty-four thousand, five hundred forty-nine".