129204527538 has 16 divisors (see below), whose sum is σ = 262048620096. Its totient is φ = 42461581680.

The previous prime is 129204527533. The next prime is 129204527603. The reversal of 129204527538 is 835725402921.

It is a super-3 number, since 3×129204527538³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (129204527533) 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, 151648081 + ... + 151648932.

It is an arithmetic number, because the mean of its divisors is an integer number (16378038756).

Almost surely, 2^129204527538 is an apocalyptic number.

129204527538 is an abundant number, since it is smaller than the sum of its proper divisors (132844092558).

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

129204527538 is a wasteful number, since it uses less digits than its factorization.

129204527538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303297089.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 129204527538 in words is "one hundred twenty-nine billion, two hundred four million, five hundred twenty-seven thousand, five hundred thirty-eight".