85384388520 has 64 divisors (see below), whose sum is σ = 284614632000. Its totient is φ = 22769169984.

The previous prime is 85384388519. The next prime is 85384388533. The reversal of 85384388520 is 2588348358.

85384388520 is a `hidden beast` number, since 8 + 5 + 3 + 84 + 38 + 8 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39528730 + ... + 39530889.

It is an arithmetic number, because the mean of its divisors is an integer number (4447103625).

Almost surely, 2^85384388520 is an apocalyptic number.

It is an amenable number.

85384388520 is an abundant number, since it is smaller than the sum of its proper divisors (199230243480).

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

85384388520 is a wasteful number, since it uses less digits than its factorization.

85384388520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79059639 (or 79059629 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 54.

The spelling of 85384388520 in words is "eighty-five billion, three hundred eighty-four million, three hundred eighty-eight thousand, five hundred twenty".