85644341705 has 16 divisors (see below), whose sum is σ = 110857696320. Its totient is φ = 63142849728.

The previous prime is 85644341687. The next prime is 85644341707. The reversal of 85644341705 is 50714344658.

It is a cyclic number.

It is not a de Polignac number, because 85644341705 - 2⁸ = 85644341449 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85644341705.

It is not an unprimeable number, because it can be changed into a prime (85644341707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1024067 + ... + 1104536.

It is an arithmetic number, because the mean of its divisors is an integer number (6928606020).

Almost surely, 2^85644341705 is an apocalyptic number.

It is an amenable number.

85644341705 is a deficient number, since it is larger than the sum of its proper divisors (25213354615).

85644341705 is a wasteful number, since it uses less digits than its factorization.

85644341705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129240.

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 85644341705 in words is "eighty-five billion, six hundred forty-four million, three hundred forty-one thousand, seven hundred five".