129731947800 has 768 divisors, whose sum is σ = 509727375360. Its totient is φ = 26568622080.

The previous prime is 129731947781. The next prime is 129731947811. The reversal of 129731947800 is 8749137921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 367512424 + ... + 367512776.

It is an arithmetic number, because the mean of its divisors is an integer number (663707520).

Almost surely, 2^129731947800 is an apocalyptic number.

129731947800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129731947800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254863687680).

129731947800 is an abundant number, since it is smaller than the sum of its proper divisors (379995427560).

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

129731947800 is a wasteful number, since it uses less digits than its factorization.

129731947800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 129731947800 in words is "one hundred twenty-nine billion, seven hundred thirty-one million, nine hundred forty-seven thousand, eight hundred".