86725578857 has 2 divisors, whose sum is σ = 86725578858. Its totient is φ = 86725578856.

The previous prime is 86725578851. The next prime is 86725578899. The reversal of 86725578857 is 75887552768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84364687936 + 2360890921 = 290456^2 + 48589^2 .

It is a cyclic number.

It is not a de Polignac number, because 86725578857 - 2⁸ = 86725578601 is a prime.

It is not a weakly prime, because it can be changed into another prime (86725578851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43362789428 + 43362789429.

It is an arithmetic number, because the mean of its divisors is an integer number (43362789429).

Almost surely, 2^86725578857 is an apocalyptic number.

It is an amenable number.

86725578857 is a deficient number, since it is larger than the sum of its proper divisors (1).

86725578857 is an equidigital number, since it uses as much as digits as its factorization.

86725578857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424000, while the sum is 68.

The spelling of 86725578857 in words is "eighty-six billion, seven hundred twenty-five million, five hundred seventy-eight thousand, eight hundred fifty-seven".