85638447147 has 16 divisors (see below), whose sum is σ = 124572782592. Its totient is φ = 51898852320.

The previous prime is 85638447079. The next prime is 85638447163. The reversal of 85638447147 is 74174483658.

It is not a de Polignac number, because 85638447147 - 2²⁰ = 85637398571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85638447197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523653 + ... + 667449.

It is an arithmetic number, because the mean of its divisors is an integer number (7785798912).

Almost surely, 2^85638447147 is an apocalyptic number.

85638447147 is a deficient number, since it is larger than the sum of its proper divisors (38934335445).

85638447147 is a wasteful number, since it uses less digits than its factorization.

85638447147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161858.

The product of its digits is 18063360, while the sum is 57.

The spelling of 85638447147 in words is "eighty-five billion, six hundred thirty-eight million, four hundred forty-seven thousand, one hundred forty-seven".