85245906815 has 4 divisors (see below), whose sum is σ = 102295088184. Its totient is φ = 68196725448.

The previous prime is 85245906689. The next prime is 85245906817. The reversal of 85245906815 is 51860954258.

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

It is a cyclic number.

It is not a de Polignac number, because 85245906815 - 2¹⁰ = 85245905791 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 (85245906817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8524590677 + ... + 8524590686.

It is an arithmetic number, because the mean of its divisors is an integer number (25573772046).

Almost surely, 2^85245906815 is an apocalyptic number.

85245906815 is a deficient number, since it is larger than the sum of its proper divisors (17049181369).

85245906815 is a wasteful number, since it uses less digits than its factorization.

85245906815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17049181368.

The product of its (nonzero) digits is 3456000, while the sum is 53.

The spelling of 85245906815 in words is "eighty-five billion, two hundred forty-five million, nine hundred six thousand, eight hundred fifteen".