85715128636 has 12 divisors (see below), whose sum is σ = 150419309040. Its totient is φ = 42738183200.

The previous prime is 85715128633. The next prime is 85715128679. The reversal of 85715128636 is 63682151758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85715128633) 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 3 ways as a sum of consecutive naturals, for example, 29843665 + ... + 29846536.

It is an arithmetic number, because the mean of its divisors is an integer number (12534942420).

Almost surely, 2^85715128636 is an apocalyptic number.

It is an amenable number.

85715128636 is a deficient number, since it is larger than the sum of its proper divisors (64704180404).

85715128636 is a wasteful number, since it uses less digits than its factorization.

85715128636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59690564 (or 59690562 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The spelling of 85715128636 in words is "eighty-five billion, seven hundred fifteen million, one hundred twenty-eight thousand, six hundred thirty-six".