85081928447 has 4 divisors (see below), whose sum is σ = 87826506816. Its totient is φ = 82337350080.

The previous prime is 85081928441. The next prime is 85081928473. The reversal of 85081928447 is 74482918058.

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 85081928447 - 2²⁴ = 85065151231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85081928392 and 85081928401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85081928441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1372289138 + ... + 1372289199.

It is an arithmetic number, because the mean of its divisors is an integer number (21956626704).

Almost surely, 2^85081928447 is an apocalyptic number.

85081928447 is a deficient number, since it is larger than the sum of its proper divisors (2744578369).

85081928447 is a wasteful number, since it uses less digits than its factorization.

85081928447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744578368.

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 85081928447 in words is "eighty-five billion, eighty-one million, nine hundred twenty-eight thousand, four hundred forty-seven".