85528720818 has 48 divisors (see below), whose sum is σ = 196996924800. Its totient is φ = 26741642400.

The previous prime is 85528720751. The next prime is 85528720831. The reversal of 85528720818 is 81802782558.

85528720818 is a `hidden beast` number, since 8 + 552 + 8 + 7 + 2 + 0 + 81 + 8 = 666.

It is a Curzon 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, 1203498 + ... + 1272581.

It is an arithmetic number, because the mean of its divisors is an integer number (4104102600).

Almost surely, 2^85528720818 is an apocalyptic number.

85528720818 is an abundant number, since it is smaller than the sum of its proper divisors (111468203982).

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

85528720818 is a wasteful number, since it uses less digits than its factorization.

85528720818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476207 (or 2476204 counting only the distinct ones).

The product of its (nonzero) digits is 2867200, while the sum is 54.

The spelling of 85528720818 in words is "eighty-five billion, five hundred twenty-eight million, seven hundred twenty thousand, eight hundred eighteen".