85212057720 has 64 divisors (see below), whose sum is σ = 257264485920. Its totient is φ = 22578476544.

The previous prime is 85212057709. The next prime is 85212057727. The reversal of 85212057720 is 2775021258.

It is a super-2 number, since 2×85212057720² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85212057727) 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 15 ways as a sum of consecutive naturals, for example, 2242627 + ... + 2280306.

Almost surely, 2^85212057720 is an apocalyptic number.

It is an amenable number.

85212057720 is an abundant number, since it is smaller than the sum of its proper divisors (172052428200).

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

85212057720 is a wasteful number, since it uses less digits than its factorization.

85212057720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523104 (or 4523100 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 39.

Adding to 85212057720 its reverse (2775021258), we get a palindrome (87987078978).

The spelling of 85212057720 in words is "eighty-five billion, two hundred twelve million, fifty-seven thousand, seven hundred twenty".