129268056565 has 16 divisors (see below), whose sum is σ = 155675520000. Its totient is φ = 103045448320.

The previous prime is 129268056529. The next prime is 129268056571. The reversal of 129268056565 is 565650862921.

It is not a de Polignac number, because 129268056565 - 2¹³ = 129268048373 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 4911561 + ... + 4937809.

It is an arithmetic number, because the mean of its divisors is an integer number (9729720000).

Almost surely, 2^129268056565 is an apocalyptic number.

It is an amenable number.

129268056565 is a deficient number, since it is larger than the sum of its proper divisors (26407463435).

129268056565 is a wasteful number, since it uses less digits than its factorization.

129268056565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29732.

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 129268056565 in words is "one hundred twenty-nine billion, two hundred sixty-eight million, fifty-six thousand, five hundred sixty-five".