2781796704673 has 16 divisors (see below), whose sum is σ = 3183820948480. Its totient is φ = 2380929235776.

The previous prime is 2781796704637. The next prime is 2781796704679. The reversal of 2781796704673 is 3764076971872.

It is not a de Polignac number, because 2781796704673 - 2⁹ = 2781796704161 is a prime.

It is a super-2 number, since 2×2781796704673² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2781796704599 and 2781796704608.

It is not an unprimeable number, because it can be changed into a prime (2781796704679) 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, 86836423 + ... + 86868451.

It is an arithmetic number, because the mean of its divisors is an integer number (198988809280).

Almost surely, 2^{2781796704673} is an apocalyptic number.

It is an amenable number.

2781796704673 is a deficient number, since it is larger than the sum of its proper divisors (402024243807).

2781796704673 is a wasteful number, since it uses less digits than its factorization.

2781796704673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49696.

The product of its (nonzero) digits is 149361408, while the sum is 67.

The spelling of 2781796704673 in words is "two trillion, seven hundred eighty-one billion, seven hundred ninety-six million, seven hundred four thousand, six hundred seventy-three".