2781368673 has 16 divisors (see below), whose sum is σ = 3731376000. Its totient is φ = 1842825600.

The previous prime is 2781368671. The next prime is 2781368677. The reversal of 2781368673 is 3768631872.

It is not a de Polignac number, because 2781368673 - 2¹ = 2781368671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2781368671) by changing a digit.

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, 659973 + ... + 664173.

It is an arithmetic number, because the mean of its divisors is an integer number (233211000).

Almost surely, 2^2781368673 is an apocalyptic number.

It is an amenable number.

2781368673 is a deficient number, since it is larger than the sum of its proper divisors (950007327).

2781368673 is a wasteful number, since it uses less digits than its factorization.

2781368673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5512.

The product of its digits is 2032128, while the sum is 51.

The square root of 2781368673 is about 52738.6828902657. The cubic root of 2781368673 is about 1406.3265836732.

The spelling of 2781368673 in words is "two billion, seven hundred eighty-one million, three hundred sixty-eight thousand, six hundred seventy-three".