2806624864861 has 8 divisors (see below), whose sum is σ = 2864166233400. Its totient is φ = 2749599562752.

The previous prime is 2806624864819. The next prime is 2806624864871. The reversal of 2806624864861 is 1684684266082.

It can be written as a sum of positive squares in 4 ways, for example, as 303287011225 + 2503337853636 = 550715^2 + 1582194^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2806624864861 - 2⁹ = 2806624864349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2806624864861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806624864801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129005620 + ... + 129027373.

It is an arithmetic number, because the mean of its divisors is an integer number (358020779175).

Almost surely, 2^{2806624864861} is an apocalyptic number.

It is an amenable number.

2806624864861 is a deficient number, since it is larger than the sum of its proper divisors (57541368539).

2806624864861 is a wasteful number, since it uses less digits than its factorization.

2806624864861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258033215.

The product of its (nonzero) digits is 42467328, while the sum is 61.

The spelling of 2806624864861 in words is "two trillion, eight hundred six billion, six hundred twenty-four million, eight hundred sixty-four thousand, eight hundred sixty-one".