129373666560 has 864 divisors, whose sum is σ = 503817874560. Its totient is φ = 31659393024.

The previous prime is 129373666547. The next prime is 129373666589. The reversal of 129373666560 is 65666373921.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 129373666497 and 129373666506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 227369956 + ... + 227370524.

It is an arithmetic number, because the mean of its divisors is an integer number (583122540).

Almost surely, 2^129373666560 is an apocalyptic number.

129373666560 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 129373666560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251908937280).

129373666560 is an abundant number, since it is smaller than the sum of its proper divisors (374444208000).

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

129373666560 is an equidigital number, since it uses as much as digits as its factorization.

129373666560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 54.

The spelling of 129373666560 in words is "one hundred twenty-nine billion, three hundred seventy-three million, six hundred sixty-six thousand, five hundred sixty".