8786861263861 has 4 divisors (see below), whose sum is σ = 8788762774924. Its totient is φ = 8784959752800.

The previous prime is 8786861263853. The next prime is 8786861263867. The reversal of 8786861263861 is 1683621686878.

It is a happy number.

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 3393756106225 + 5393105157636 = 1842215^2 + 2322306^2 .

It is a cyclic number.

It is not a de Polignac number, because 8786861263861 - 2³ = 8786861263853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8786861263867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950748600 + ... + 950757841.

It is an arithmetic number, because the mean of its divisors is an integer number (2197190693731).

Almost surely, 2^{8786861263861} is an apocalyptic number.

It is an amenable number.

8786861263861 is a deficient number, since it is larger than the sum of its proper divisors (1901511063).

8786861263861 is a wasteful number, since it uses less digits than its factorization.

8786861263861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901511062.

The product of its digits is 222953472, while the sum is 70.

The spelling of 8786861263861 in words is "eight trillion, seven hundred eighty-six billion, eight hundred sixty-one million, two hundred sixty-three thousand, eight hundred sixty-one".