129797168081 has 16 divisors (see below), whose sum is σ = 156559027200. Its totient is φ = 105121065168.

The previous prime is 129797168077. The next prime is 129797168089. The reversal of 129797168081 is 180861797921.

It is not a de Polignac number, because 129797168081 - 2² = 129797168077 is a prime.

It is a super-2 number, since 2×129797168081² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129797168081.

It is not an unprimeable number, because it can be changed into a prime (129797168089) 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 15 ways as a sum of consecutive naturals, for example, 1237085 + ... + 1337898.

It is an arithmetic number, because the mean of its divisors is an integer number (9784939200).

Almost surely, 2^129797168081 is an apocalyptic number.

It is an amenable number.

129797168081 is a deficient number, since it is larger than the sum of its proper divisors (26761859119).

129797168081 is a wasteful number, since it uses less digits than its factorization.

129797168081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575388.

The product of its (nonzero) digits is 3048192, while the sum is 59.

The spelling of 129797168081 in words is "one hundred twenty-nine billion, seven hundred ninety-seven million, one hundred sixty-eight thousand, eighty-one".