2678267817 has 12 divisors (see below), whose sum is σ = 3873649780. Its totient is φ = 1783185408.

The previous prime is 2678267807. The next prime is 2678267819. The reversal of 2678267817 is 7187628762.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1002102336 + 1676165481 = 31656^2 + 40941^2 .

It is not a de Polignac number, because 2678267817 - 2²³ = 2669879209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678267819) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 186568 + ... + 200409.

Almost surely, 2^2678267817 is an apocalyptic number.

It is an amenable number.

2678267817 is a deficient number, since it is larger than the sum of its proper divisors (1195381963).

2678267817 is a wasteful number, since it uses less digits than its factorization.

2678267817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387752 (or 387749 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 2678267817 is about 51751.9837011104. The cubic root of 2678267817 is about 1388.7305866613.

The spelling of 2678267817 in words is "two billion, six hundred seventy-eight million, two hundred sixty-seven thousand, eight hundred seventeen".