129565016 has 48 divisors (see below), whose sum is σ = 285330600. Its totient is φ = 54991104.

The previous prime is 129565013. The next prime is 129565021. The reversal of 129565016 is 610565921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129565013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40400 + ... + 43488.

Almost surely, 2^129565016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129565016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142665300).

129565016 is an abundant number, since it is smaller than the sum of its proper divisors (155765584).

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

129565016 is a wasteful number, since it uses less digits than its factorization.

129565016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216 (or 3205 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 129565016 is about 11382.6629573224. The cubic root of 129565016 is about 506.0140601320.

The spelling of 129565016 in words is "one hundred twenty-nine million, five hundred sixty-five thousand, sixteen".