8173421304870 has 256 divisors, whose sum is σ = 21892726407168. Its totient is φ = 1945640632320.

The previous prime is 8173421304821. The next prime is 8173421304871. The reversal of 8173421304870 is 784031243718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8173421304871) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 89385894 + ... + 89477286.

It is an arithmetic number, because the mean of its divisors is an integer number (85518462528).

Almost surely, 2^{8173421304870} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8173421304870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10946363203584).

8173421304870 is an abundant number, since it is smaller than the sum of its proper divisors (13719305102298).

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

8173421304870 is a wasteful number, since it uses less digits than its factorization.

8173421304870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91607.

The product of its (nonzero) digits is 903168, while the sum is 48.

It can be divided in two parts, 817342 and 1304870, that added together give a palindrome (2122212).

The spelling of 8173421304870 in words is "eight trillion, one hundred seventy-three billion, four hundred twenty-one million, three hundred four thousand, eight hundred seventy".