129956016 has 20 divisors (see below), whose sum is σ = 335719832. Its totient is φ = 43318656.

The previous prime is 129955981. The next prime is 129956023. The reversal of 129956016 is 610659921.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 1353661 + ... + 1353756.

Almost surely, 2^129956016 is an apocalyptic number.

129956016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129956016 is an abundant number, since it is smaller than the sum of its proper divisors (205763816).

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

129956016 is a wasteful number, since it uses less digits than its factorization.

129956016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707428 (or 2707422 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 129956016 is about 11399.8252618187. The cubic root of 129956016 is about 506.5225636666.

The spelling of 129956016 in words is "one hundred twenty-nine million, nine hundred fifty-six thousand, sixteen".