858863368861 has 2 divisors, whose sum is σ = 858863368862. Its totient is φ = 858863368860.

The previous prime is 858863368849. The next prime is 858863368903. The reversal of 858863368861 is 168863368858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858228076836 + 635292025 = 926406^2 + 25205^2 .

It is a cyclic number.

It is not a de Polignac number, because 858863368861 - 2¹⁹ = 858862844573 is a prime.

It is a super-2 number, since 2×858863368861² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858863368661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429431684430 + 429431684431.

It is an arithmetic number, because the mean of its divisors is an integer number (429431684431).

Almost surely, 2^858863368861 is an apocalyptic number.

It is an amenable number.

858863368861 is a deficient number, since it is larger than the sum of its proper divisors (1).

858863368861 is an equidigital number, since it uses as much as digits as its factorization.

858863368861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 318504960, while the sum is 70.

The spelling of 858863368861 in words is "eight hundred fifty-eight billion, eight hundred sixty-three million, three hundred sixty-eight thousand, eight hundred sixty-one".