85865550432566 has 4 divisors (see below), whose sum is σ = 128798325648852. Its totient is φ = 42932775216282.

The previous prime is 85865550432553. The next prime is 85865550432587. The reversal of 85865550432566 is 66523405556858.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 85865550432496 and 85865550432505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21466387608140 + ... + 21466387608143.

It is an arithmetic number, because the mean of its divisors is an integer number (32199581412213).

Almost surely, 2^{85865550432566} is an apocalyptic number.

85865550432566 is a deficient number, since it is larger than the sum of its proper divisors (42932775216286).

85865550432566 is a wasteful number, since it uses less digits than its factorization.

85865550432566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42932775216285.

The product of its (nonzero) digits is 1036800000, while the sum is 68.

The spelling of 85865550432566 in words is "eighty-five trillion, eight hundred sixty-five billion, five hundred fifty million, four hundred thirty-two thousand, five hundred sixty-six".