129273954480 has 640 divisors, whose sum is σ = 501897876480. Its totient is φ = 30311424000.

The previous prime is 129273954463. The next prime is 129273954529. The reversal of 129273954480 is 84459372921.

129273954480 is a `hidden beast` number, since 1 + 2 + 9 + 2 + 73 + 95 + 4 + 480 = 666.

It is a super-2 number, since 2×129273954480² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 127614454 + ... + 127615466.

It is an arithmetic number, because the mean of its divisors is an integer number (784215432).

Almost surely, 2^129273954480 is an apocalyptic number.

129273954480 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 129273954480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250948938240).

129273954480 is an abundant number, since it is smaller than the sum of its proper divisors (372623922000).

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

129273954480 is a wasteful number, since it uses less digits than its factorization.

129273954480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 129273954480 in words is "one hundred twenty-nine billion, two hundred seventy-three million, nine hundred fifty-four thousand, four hundred eighty".