85438697785 has 16 divisors (see below), whose sum is σ = 117242199936. Its totient is φ = 58551971328.

The previous prime is 85438697779. The next prime is 85438697789. The reversal of 85438697785 is 58779683458.

It is a cyclic number.

It is not a de Polignac number, because 85438697785 - 2³ = 85438697777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85438697789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659847 + ... + 778636.

It is an arithmetic number, because the mean of its divisors is an integer number (7327637496).

Almost surely, 2^85438697785 is an apocalyptic number.

It is an amenable number.

85438697785 is a deficient number, since it is larger than the sum of its proper divisors (31803502151).

85438697785 is a wasteful number, since it uses less digits than its factorization.

85438697785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440192.

The product of its digits is 406425600, while the sum is 70.

The spelling of 85438697785 in words is "eighty-five billion, four hundred thirty-eight million, six hundred ninety-seven thousand, seven hundred eighty-five".