85664322265 has 4 divisors (see below), whose sum is σ = 102797186724. Its totient is φ = 68531457808.

The previous prime is 85664322253. The next prime is 85664322281. The reversal of 85664322265 is 56222346658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56222346658 = 2 ⋅28111173329.

It can be written as a sum of positive squares in 2 ways, for example, as 11107473664 + 74556848601 = 105392^2 + 273051^2 .

It is a cyclic number.

It is not a de Polignac number, because 85664322265 - 2²¹ = 85662225113 is a prime.

It is a super-2 number, since 2×85664322265² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8566432222 + ... + 8566432231.

It is an arithmetic number, because the mean of its divisors is an integer number (25699296681).

Almost surely, 2^85664322265 is an apocalyptic number.

It is an amenable number.

85664322265 is a deficient number, since it is larger than the sum of its proper divisors (17132864459).

85664322265 is a wasteful number, since it uses less digits than its factorization.

85664322265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17132864458.

The product of its digits is 4147200, while the sum is 49.

The spelling of 85664322265 in words is "eighty-five billion, six hundred sixty-four million, three hundred twenty-two thousand, two hundred sixty-five".