129552568 has 8 divisors (see below), whose sum is σ = 242911080. Its totient is φ = 64776280.

The previous prime is 129552557. The next prime is 129552569. The reversal of 129552568 is 865255921.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129552569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8097028 + ... + 8097043.

It is an arithmetic number, because the mean of its divisors is an integer number (30363885).

Almost surely, 2^129552568 is an apocalyptic number.

It is an amenable number.

129552568 is a deficient number, since it is larger than the sum of its proper divisors (113358512).

129552568 is a wasteful number, since it uses less digits than its factorization.

129552568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16194077 (or 16194073 counting only the distinct ones).

The product of its digits is 216000, while the sum is 43.

The square root of 129552568 is about 11382.1161477117. The cubic root of 129552568 is about 505.9978544593.

The spelling of 129552568 in words is "one hundred twenty-nine million, five hundred fifty-two thousand, five hundred sixty-eight".