129185319504784 has 15 divisors (see below), whose sum is σ = 250296644626833. Its totient is φ = 64592637020448.

The previous prime is 129185319504779. The next prime is 129185319504799. The reversal of 129185319504784 is 487405913581921.

The square root of 129185319504784 is 11365972.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 27761728723600 + 101423590781184 = 5268940^2 + 10070928^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 44043142 + ... + 46884634.

Almost surely, 2^{129185319504784} is an apocalyptic number.

129185319504784 is the 11365972-nd square number.

It is an amenable number.

129185319504784 is a deficient number, since it is larger than the sum of its proper divisors (121111325122049).

129185319504784 is an frugal number, since it uses more digits than its factorization.

129185319504784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5682994 (or 2841495 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 67.

The spelling of 129185319504784 in words is "one hundred twenty-nine trillion, one hundred eighty-five billion, three hundred nineteen million, five hundred four thousand, seven hundred eighty-four".