129916816 has 20 divisors (see below), whose sum is σ = 252327600. Its totient is φ = 64800032.

The previous prime is 129916793. The next prime is 129916837. The reversal of 129916816 is 618619921.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2986 + ... + 16393.

It is an arithmetic number, because the mean of its divisors is an integer number (12616380).

Almost surely, 2^129916816 is an apocalyptic number.

129916816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129916816 is a deficient number, since it is larger than the sum of its proper divisors (122410784).

129916816 is a wasteful number, since it uses less digits than its factorization.

129916816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19806 (or 19800 counting only the distinct ones).

The product of its digits is 46656, while the sum is 43.

The square root of 129916816 is about 11398.1058075454. The cubic root of 129916816 is about 506.4716293021.

The spelling of 129916816 in words is "one hundred twenty-nine million, nine hundred sixteen thousand, eight hundred sixteen".