2863867681 has 4 divisors (see below), whose sum is σ = 2873017732. Its totient is φ = 2854717632.

The previous prime is 2863867649. The next prime is 2863867691. The reversal of 2863867681 is 1867683682.

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 139027681 + 2724840000 = 11791^2 + 52200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2863867681 - 2⁵ = 2863867649 is a prime.

It is a super-2 number, since 2×2863867681² = 16403476188552635522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2863867621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4574556 + ... + 4575181.

It is an arithmetic number, because the mean of its divisors is an integer number (718254433).

Almost surely, 2^2863867681 is an apocalyptic number.

It is an amenable number.

2863867681 is a deficient number, since it is larger than the sum of its proper divisors (9150051).

2863867681 is an equidigital number, since it uses as much as digits as its factorization.

2863867681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9150050.

The product of its digits is 4644864, while the sum is 55.

The square root of 2863867681 is about 53515.1163784589. The cubic root of 2863867681 is about 1420.0958212466.

The spelling of 2863867681 in words is "two billion, eight hundred sixty-three million, eight hundred sixty-seven thousand, six hundred eighty-one".