129980884449 has 16 divisors (see below), whose sum is σ = 191683524032. Its totient is φ = 77826391488.

The previous prime is 129980884441. The next prime is 129980884487. The reversal of 129980884449 is 944488089921.

It is not a de Polignac number, because 129980884449 - 2³ = 129980884441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129980884449.

It is not an unprimeable number, because it can be changed into a prime (129980884441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45036979 + ... + 45039864.

It is an arithmetic number, because the mean of its divisors is an integer number (11980220252).

Almost surely, 2^129980884449 is an apocalyptic number.

It is an amenable number.

129980884449 is a deficient number, since it is larger than the sum of its proper divisors (61702639583).

129980884449 is a wasteful number, since it uses less digits than its factorization.

129980884449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90076896.

The product of its (nonzero) digits is 47775744, while the sum is 66.

The spelling of 129980884449 in words is "one hundred twenty-nine billion, nine hundred eighty million, eight hundred eighty-four thousand, four hundred forty-nine".