17199128981 has 2 divisors, whose sum is σ = 17199128982. Its totient is φ = 17199128980.

The previous prime is 17199128957. The next prime is 17199128987. The reversal of 17199128981 is 18982199171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9390579025 + 7808549956 = 96905^2 + 88366^2 .

It is a cyclic number.

It is not a de Polignac number, because 17199128981 - 2²² = 17194934677 is a prime.

It is a super-2 number, since 2×17199128981² (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 (17199128987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8599564490 + 8599564491.

It is an arithmetic number, because the mean of its divisors is an integer number (8599564491).

Almost surely, 2^17199128981 is an apocalyptic number.

It is an amenable number.

17199128981 is a deficient number, since it is larger than the sum of its proper divisors (1).

17199128981 is an equidigital number, since it uses as much as digits as its factorization.

17199128981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 56.

The spelling of 17199128981 in words is "seventeen billion, one hundred ninety-nine million, one hundred twenty-eight thousand, nine hundred eighty-one".