17125721988 has 12 divisors (see below), whose sum is σ = 39960018000. Its totient is φ = 5708573992.

The previous prime is 17125721981. The next prime is 17125722013. The reversal of 17125721988 is 88912752171.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×17125721988² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 17125721988.

It is not an unprimeable number, because it can be changed into a prime (17125721981) 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, 713571738 + ... + 713571761.

It is an arithmetic number, because the mean of its divisors is an integer number (3330001500).

Almost surely, 2^17125721988 is an apocalyptic number.

It is an amenable number.

17125721988 is an abundant number, since it is smaller than the sum of its proper divisors (22834296012).

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

17125721988 is a wasteful number, since it uses less digits than its factorization.

17125721988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427143506 (or 1427143504 counting only the distinct ones).

The product of its digits is 564480, while the sum is 51.

The spelling of 17125721988 in words is "seventeen billion, one hundred twenty-five million, seven hundred twenty-one thousand, nine hundred eighty-eight".