129365516 has 24 divisors (see below), whose sum is σ = 258978720. Its totient is φ = 55389312.

The previous prime is 129365507. The next prime is 129365519. The reversal of 129365516 is 615563921.

It is a self number, because there is not a number n which added to its sum of digits gives 129365516.

It is not an unprimeable number, because it can be changed into a prime (129365519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46040 + ... + 48768.

It is an arithmetic number, because the mean of its divisors is an integer number (10790780).

Almost surely, 2^129365516 is an apocalyptic number.

It is an amenable number.

129365516 is an abundant number, since it is smaller than the sum of its proper divisors (129613204).

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

129365516 is a wasteful number, since it uses less digits than its factorization.

129365516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4433 (or 4431 counting only the distinct ones).

The product of its digits is 48600, while the sum is 38.

The square root of 129365516 is about 11373.8962541426. The cubic root of 129365516 is about 505.7542120507.

The spelling of 129365516 in words is "one hundred twenty-nine million, three hundred sixty-five thousand, five hundred sixteen".