85299120820 has 12 divisors (see below), whose sum is σ = 179128153764. Its totient is φ = 34119648320.

The previous prime is 85299120773. The next prime is 85299120839. The reversal of 85299120820 is 2802199258.

It can be written as a sum of positive squares in 2 ways, for example, as 30395132964 + 54903987856 = 174342^2 + 234316^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2132478001 + ... + 2132478040.

It is an arithmetic number, because the mean of its divisors is an integer number (14927346147).

Almost surely, 2^85299120820 is an apocalyptic number.

It is an amenable number.

85299120820 is an abundant number, since it is smaller than the sum of its proper divisors (93829032944).

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

85299120820 is a wasteful number, since it uses less digits than its factorization.

85299120820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264956050 (or 4264956048 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 85299120820 in words is "eighty-five billion, two hundred ninety-nine million, one hundred twenty thousand, eight hundred twenty".