85715128635 has 8 divisors (see below), whose sum is σ = 137144205840. Its totient is φ = 45714735264.

The previous prime is 85715128633. The next prime is 85715128679. The reversal of 85715128635 is 53682151758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85715128635 - 2¹ = 85715128633 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (85715128633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2857170940 + ... + 2857170969.

It is an arithmetic number, because the mean of its divisors is an integer number (17143025730).

Almost surely, 2^85715128635 is an apocalyptic number.

85715128635 is a deficient number, since it is larger than the sum of its proper divisors (51429077205).

85715128635 is a wasteful number, since it uses less digits than its factorization.

85715128635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714341917.

The product of its digits is 2016000, while the sum is 51.

The spelling of 85715128635 in words is "eighty-five billion, seven hundred fifteen million, one hundred twenty-eight thousand, six hundred thirty-five".