86315565673 has 2 divisors, whose sum is σ = 86315565674. Its totient is φ = 86315565672.

The previous prime is 86315565649. The next prime is 86315565683. The reversal of 86315565673 is 37656551368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64218148569 + 22097417104 = 253413^2 + 148652^2 .

It is a cyclic number.

It is not a de Polignac number, because 86315565673 - 2²⁹ = 85778694761 is a prime.

It is not a weakly prime, because it can be changed into another prime (86315565643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43157782836 + 43157782837.

It is an arithmetic number, because the mean of its divisors is an integer number (43157782837).

Almost surely, 2^86315565673 is an apocalyptic number.

It is an amenable number.

86315565673 is a deficient number, since it is larger than the sum of its proper divisors (1).

86315565673 is an equidigital number, since it uses as much as digits as its factorization.

86315565673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608000, while the sum is 55.

The spelling of 86315565673 in words is "eighty-six billion, three hundred fifteen million, five hundred sixty-five thousand, six hundred seventy-three".