86815378073 has 2 divisors, whose sum is σ = 86815378074. Its totient is φ = 86815378072.

The previous prime is 86815378063. The next prime is 86815378103. The reversal of 86815378073 is 37087351868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57701804944 + 29113573129 = 240212^2 + 170627^2 .

It is a cyclic number.

It is not a de Polignac number, because 86815378073 - 2¹⁸ = 86815115929 is a prime.

It is not a weakly prime, because it can be changed into another prime (86815378043) 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, 43407689036 + 43407689037.

It is an arithmetic number, because the mean of its divisors is an integer number (43407689037).

Almost surely, 2^86815378073 is an apocalyptic number.

It is an amenable number.

86815378073 is a deficient number, since it is larger than the sum of its proper divisors (1).

86815378073 is an equidigital number, since it uses as much as digits as its factorization.

86815378073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 86815378073 in words is "eighty-six billion, eight hundred fifteen million, three hundred seventy-eight thousand, seventy-three".