129204302500 has 405 divisors, whose sum is σ = 360463096917. Its totient is φ = 40373424000.

The previous prime is 129204302497. The next prime is 129204302501. The reversal of 129204302500 is 5203402921.

The square root of 129204302500 is 359450.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 127618988644 + 1585313856 = 357238^2 + 39816^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (129204302501) by changing a digit.

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 134 ways as a sum of consecutive naturals, for example, 1635497461 + ... + 1635497539.

Almost surely, 2^129204302500 is an apocalyptic number.

129204302500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129204302500 is the 359450-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129204302500

129204302500 is an abundant number, since it is smaller than the sum of its proper divisors (231258794417).

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

129204302500 is an equidigital number, since it uses as much as digits as its factorization.

129204302500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 129204302500 in words is "one hundred twenty-nine billion, two hundred four million, three hundred two thousand, five hundred".