85530920816 has 40 divisors (see below), whose sum is σ = 183845376000. Its totient is φ = 38218742720.

The previous prime is 85530920807. The next prime is 85530920819. The reversal of 85530920816 is 61802903558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85530920819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4108016 + ... + 4128783.

It is an arithmetic number, because the mean of its divisors is an integer number (4596134400).

Almost surely, 2^85530920816 is an apocalyptic number.

It is an amenable number.

85530920816 is an abundant number, since it is smaller than the sum of its proper divisors (98314455184).

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

85530920816 is a wasteful number, since it uses less digits than its factorization.

85530920816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8236877 (or 8236871 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 85530920816 in words is "eighty-five billion, five hundred thirty million, nine hundred twenty thousand, eight hundred sixteen".