17117672981 has 2 divisors, whose sum is σ = 17117672982. Its totient is φ = 17117672980.

The previous prime is 17117672947. The next prime is 17117672993. The reversal of 17117672981 is 18927671171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9928328881 + 7189344100 = 99641^2 + 84790^2 .

It is a cyclic number.

It is not a de Polignac number, because 17117672981 - 2⁶ = 17117672917 is a prime.

It is a super-2 number, since 2×17117672981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17117672921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8558836490 + 8558836491.

It is an arithmetic number, because the mean of its divisors is an integer number (8558836491).

Almost surely, 2^17117672981 is an apocalyptic number.

It is an amenable number.

17117672981 is a deficient number, since it is larger than the sum of its proper divisors (1).

17117672981 is an equidigital number, since it uses as much as digits as its factorization.

17117672981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 50.

The spelling of 17117672981 in words is "seventeen billion, one hundred seventeen million, six hundred seventy-two thousand, nine hundred eighty-one".