85808205720 has 96 divisors (see below), whose sum is σ = 279046310400. Its totient is φ = 22868269056.

The previous prime is 85808205709. The next prime is 85808205737. The reversal of 85808205720 is 2750280858.

85808205720 is a `hidden beast` number, since 8 + 58 + 0 + 8 + 20 + 572 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 527016 + ... + 670344.

It is an arithmetic number, because the mean of its divisors is an integer number (2906732400).

Almost surely, 2^85808205720 is an apocalyptic number.

It is an amenable number.

85808205720 is an abundant number, since it is smaller than the sum of its proper divisors (193238104680).

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

85808205720 is a wasteful number, since it uses less digits than its factorization.

85808205720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145009 (or 145002 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The spelling of 85808205720 in words is "eighty-five billion, eight hundred eight million, two hundred five thousand, seven hundred twenty".