2678273905 has 4 divisors (see below), whose sum is σ = 3213928692. Its totient is φ = 2142619120.

The previous prime is 2678273867. The next prime is 2678273933. The reversal of 2678273905 is 5093728762.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1546691584 + 1131582321 = 39328^2 + 33639^2 .

It is not a de Polignac number, because 2678273905 - 2²³ = 2669885297 is a prime.

It is a super-2 number, since 2×2678273905² = 14346302220407898050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267827386 + ... + 267827395.

It is an arithmetic number, because the mean of its divisors is an integer number (803482173).

Almost surely, 2^2678273905 is an apocalyptic number.

It is an amenable number.

2678273905 is a deficient number, since it is larger than the sum of its proper divisors (535654787).

2678273905 is an equidigital number, since it uses as much as digits as its factorization.

2678273905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535654786.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The square root of 2678273905 is about 51752.0425200784. The cubic root of 2678273905 is about 1388.7316389068.

The spelling of 2678273905 in words is "two billion, six hundred seventy-eight million, two hundred seventy-three thousand, nine hundred five".