129697808816 has 40 divisors (see below), whose sum is σ = 270666813120. Its totient is φ = 60007058496.

The previous prime is 129697808789. The next prime is 129697808819. The reversal of 129697808816 is 618808796921.

It is a super-2 number, since 2×129697808816² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129697808819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4947830 + ... + 4973973.

It is an arithmetic number, because the mean of its divisors is an integer number (6766670328).

Almost surely, 2^129697808816 is an apocalyptic number.

129697808816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129697808816 is an abundant number, since it is smaller than the sum of its proper divisors (140969004304).

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

129697808816 is a wasteful number, since it uses less digits than its factorization.

129697808816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9921873 (or 9921867 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 65.

The spelling of 129697808816 in words is "one hundred twenty-nine billion, six hundred ninety-seven million, eight hundred eight thousand, eight hundred sixteen".