85320670705 has 4 divisors (see below), whose sum is σ = 102384804852. Its totient is φ = 68256536560.

The previous prime is 85320670681. The next prime is 85320670709. The reversal of 85320670705 is 50707602358.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22029683776 + 63290986929 = 148424^2 + 251577^2 .

It is not a de Polignac number, because 85320670705 - 2⁷ = 85320670577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85320670709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8532067066 + ... + 8532067075.

It is an arithmetic number, because the mean of its divisors is an integer number (25596201213).

Almost surely, 2^85320670705 is an apocalyptic number.

It is an amenable number.

85320670705 is a deficient number, since it is larger than the sum of its proper divisors (17064134147).

85320670705 is a wasteful number, since it uses less digits than its factorization.

85320670705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17064134146.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 85320670705 in words is "eighty-five billion, three hundred twenty million, six hundred seventy thousand, seven hundred five".