129994715565 has 384 divisors, whose sum is σ = 299373096960. Its totient is φ = 52655961600.

The previous prime is 129994715561. The next prime is 129994715573. The reversal of 129994715565 is 565517499921.

129994715565 is a `hidden beast` number, since 1 + 2 + 9 + 9 + 9 + 4 + 71 + 556 + 5 = 666.

It is not a de Polignac number, because 129994715565 - 2² = 129994715561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129994715561) by changing a digit.

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 383 ways as a sum of consecutive naturals, for example, 160289010 + ... + 160289820.

It is an arithmetic number, because the mean of its divisors is an integer number (779617440).

Almost surely, 2^129994715565 is an apocalyptic number.

129994715565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129994715565 is an abundant number, since it is smaller than the sum of its proper divisors (169378381395).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129994715565 is a wasteful number, since it uses less digits than its factorization.

129994715565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910 (or 885 counting only the distinct ones).

The product of its digits is 30618000, while the sum is 63.

The spelling of 129994715565 in words is "one hundred twenty-nine billion, nine hundred ninety-four million, seven hundred fifteen thousand, five hundred sixty-five".