8170017972481 has 4 divisors (see below), whose sum is σ = 8170040618964. Its totient is φ = 8169995326000.

The previous prime is 8170017972439. The next prime is 8170017972509. The reversal of 8170017972481 is 1842797100718.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4430957640256 + 3739060332225 = 2104984^2 + 1933665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8170017972481 is a prime.

It is a super-2 number, since 2×8170017972481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8170017970481) 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, 10773190 + ... + 11506591.

It is an arithmetic number, because the mean of its divisors is an integer number (2042510154741).

Almost surely, 2^{8170017972481} is an apocalyptic number.

It is an amenable number.

8170017972481 is a deficient number, since it is larger than the sum of its proper divisors (22646483).

8170017972481 is a wasteful number, since it uses less digits than its factorization.

8170017972481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22646482.

The product of its (nonzero) digits is 1580544, while the sum is 55.

The spelling of 8170017972481 in words is "eight trillion, one hundred seventy billion, seventeen million, nine hundred seventy-two thousand, four hundred eighty-one".