129168574669 has 2 divisors, whose sum is σ = 129168574670. Its totient is φ = 129168574668.

The previous prime is 129168574537. The next prime is 129168574723. The reversal of 129168574669 is 966475861921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84631537225 + 44537037444 = 290915^2 + 211038^2 .

It is a cyclic number.

It is not a de Polignac number, because 129168574669 - 2¹³ = 129168566477 is a prime.

It is a super-2 number, since 2×129168574669² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129168574669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129168574369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64584287334 + 64584287335.

It is an arithmetic number, because the mean of its divisors is an integer number (64584287335).

Almost surely, 2^129168574669 is an apocalyptic number.

It is an amenable number.

129168574669 is a deficient number, since it is larger than the sum of its proper divisors (1).

129168574669 is an equidigital number, since it uses as much as digits as its factorization.

129168574669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39191040, while the sum is 64.

The spelling of 129168574669 in words is "one hundred twenty-nine billion, one hundred sixty-eight million, five hundred seventy-four thousand, six hundred sixty-nine".