129454519680 has 256 divisors, whose sum is σ = 458853120000. Its totient is φ = 34493478912.

The previous prime is 129454519679. The next prime is 129454519697. The reversal of 129454519680 is 86915454921.

129454519680 is a `hidden beast` number, since 1 + 2 + 9 + 4 + 545 + 1 + 96 + 8 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30393391 + ... + 30397649.

It is an arithmetic number, because the mean of its divisors is an integer number (1792395000).

Almost surely, 2^129454519680 is an apocalyptic number.

129454519680 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 129454519680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229426560000).

129454519680 is an abundant number, since it is smaller than the sum of its proper divisors (329398600320).

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

129454519680 is a wasteful number, since it uses less digits than its factorization.

129454519680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6046 (or 6028 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 129454519680 in words is "one hundred twenty-nine billion, four hundred fifty-four million, five hundred nineteen thousand, six hundred eighty".