129983955489505 has 16 divisors (see below), whose sum is σ = 168157777075344. Its totient is φ = 95886145163520.

The previous prime is 129983955489497. The next prime is 129983955489601. The reversal of 129983955489505 is 505984559389921.

It can be written as a sum of positive squares in 8 ways, for example, as 18641868370129 + 111342087119376 = 4317623^2 + 10551876^2 .

It is not a de Polignac number, because 129983955489505 - 2³ = 129983955489497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062506934 + ... + 1062629263.

It is an arithmetic number, because the mean of its divisors is an integer number (10509861067209).

Almost surely, 2^{129983955489505} is an apocalyptic number.

It is an amenable number.

129983955489505 is a deficient number, since it is larger than the sum of its proper divisors (38173821585839).

129983955489505 is a wasteful number, since it uses less digits than its factorization.

129983955489505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125137156.

The product of its (nonzero) digits is 6298560000, while the sum is 82.

The spelling of 129983955489505 in words is "one hundred twenty-nine trillion, nine hundred eighty-three billion, nine hundred fifty-five million, four hundred eighty-nine thousand, five hundred five".