85718644805 has 8 divisors (see below), whose sum is σ = 103191009432. Its totient is φ = 68355825408.

The previous prime is 85718644801. The next prime is 85718644819. The reversal of 85718644805 is 50844681758.

It can be written as a sum of positive squares in 4 ways, for example, as 12897463489 + 72821181316 = 113567^2 + 269854^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85718644805 - 2² = 85718644801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85718644801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27384584 + ... + 27387713.

It is an arithmetic number, because the mean of its divisors is an integer number (12898876179).

Almost surely, 2^85718644805 is an apocalyptic number.

It is an amenable number.

85718644805 is a deficient number, since it is larger than the sum of its proper divisors (17472364627).

85718644805 is a wasteful number, since it uses less digits than its factorization.

85718644805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54772615.

The product of its (nonzero) digits is 8601600, while the sum is 56.

The spelling of 85718644805 in words is "eighty-five billion, seven hundred eighteen million, six hundred forty-four thousand, eight hundred five".