86256720673 has 2 divisors, whose sum is σ = 86256720674. Its totient is φ = 86256720672.

The previous prime is 86256720607. The next prime is 86256720769. The reversal of 86256720673 is 37602765268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69720818209 + 16535902464 = 264047^2 + 128592^2 .

It is a cyclic number.

It is not a de Polignac number, because 86256720673 - 2⁹ = 86256720161 is a prime.

It is a super-2 number, since 2×86256720673² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86256720673.

It is not a weakly prime, because it can be changed into another prime (86256720073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43128360336 + 43128360337.

It is an arithmetic number, because the mean of its divisors is an integer number (43128360337).

Almost surely, 2^86256720673 is an apocalyptic number.

It is an amenable number.

86256720673 is a deficient number, since it is larger than the sum of its proper divisors (1).

86256720673 is an equidigital number, since it uses as much as digits as its factorization.

86256720673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 86256720673 in words is "eighty-six billion, two hundred fifty-six million, seven hundred twenty thousand, six hundred seventy-three".