172981359085 has 8 divisors (see below), whose sum is σ = 210980543256. Its totient is φ = 136116479040.

The previous prime is 172981359049. The next prime is 172981359127. The reversal of 172981359085 is 580953189271.

It is a happy number.

172981359085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7717284 + 172973641801 = 2778^2 + 415901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172981359085 - 2¹¹ = 172981357037 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 283575694 + ... + 283576303.

It is an arithmetic number, because the mean of its divisors is an integer number (26372567907).

Almost surely, 2^172981359085 is an apocalyptic number.

It is an amenable number.

172981359085 is a deficient number, since it is larger than the sum of its proper divisors (37999184171).

172981359085 is an equidigital number, since it uses as much as digits as its factorization.

172981359085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567152063.

The product of its (nonzero) digits is 5443200, while the sum is 58.

The spelling of 172981359085 in words is "one hundred seventy-two billion, nine hundred eighty-one million, three hundred fifty-nine thousand, eighty-five".