85865512562873 has 2 divisors, whose sum is σ = 85865512562874. Its totient is φ = 85865512562872.

The previous prime is 85865512562867. The next prime is 85865512562959. The reversal of 85865512562873 is 37826521556858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78143266257424 + 7722246305449 = 8839868^2 + 2778893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85865512562873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85865512562797 and 85865512562806.

It is not a weakly prime, because it can be changed into another prime (85865512562813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42932756281436 + 42932756281437.

It is an arithmetic number, because the mean of its divisors is an integer number (42932756281437).

Almost surely, 2^{85865512562873} is an apocalyptic number.

It is an amenable number.

85865512562873 is a deficient number, since it is larger than the sum of its proper divisors (1).

85865512562873 is an equidigital number, since it uses as much as digits as its factorization.

85865512562873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680000, while the sum is 71.

The spelling of 85865512562873 in words is "eighty-five trillion, eight hundred sixty-five billion, five hundred twelve million, five hundred sixty-two thousand, eight hundred seventy-three".