85643574816 has 48 divisors (see below), whose sum is σ = 224829730944. Its totient is φ = 28545909504.

The previous prime is 85643574799. The next prime is 85643574823. The reversal of 85643574816 is 61847534658.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336406 + ... + 2372778.

It is an arithmetic number, because the mean of its divisors is an integer number (4683952728).

Almost surely, 2^85643574816 is an apocalyptic number.

It is an amenable number.

85643574816 is an abundant number, since it is smaller than the sum of its proper divisors (139186156128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85643574816 is a wasteful number, since it uses less digits than its factorization.

85643574816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60913 (or 60905 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 57.

The spelling of 85643574816 in words is "eighty-five billion, six hundred forty-three million, five hundred seventy-four thousand, eight hundred sixteen".