85170421040 has 20 divisors (see below), whose sum is σ = 198021229104. Its totient is φ = 34068168384.

The previous prime is 85170421013. The next prime is 85170421043. The reversal of 85170421040 is 4012407158.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 85170420988 and 85170421006.

It is not an unprimeable number, because it can be changed into a prime (85170421043) by changing a digit.

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, 532315052 + ... + 532315211.

Almost surely, 2^85170421040 is an apocalyptic number.

85170421040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85170421040 is an abundant number, since it is smaller than the sum of its proper divisors (112850808064).

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

85170421040 is a wasteful number, since it uses less digits than its factorization.

85170421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064630276 (or 1064630270 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

Adding to 85170421040 its reverse (4012407158), we get a palindrome (89182828198).

The spelling of 85170421040 in words is "eighty-five billion, one hundred seventy million, four hundred twenty-one thousand, forty".