129194120880 has 160 divisors (see below), whose sum is σ = 485456785920. Its totient is φ = 31319781120.

The previous prime is 129194120851. The next prime is 129194120899. The reversal of 129194120880 is 88021491921.

It is a super-2 number, since 2×129194120880² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2694972 + ... + 2742491.

It is an arithmetic number, because the mean of its divisors is an integer number (3034104912).

Almost surely, 2^129194120880 is an apocalyptic number.

129194120880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129194120880 is an abundant number, since it is smaller than the sum of its proper divisors (356262665040).

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

129194120880 is a wasteful number, since it uses less digits than its factorization.

129194120880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5437496 (or 5437484 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 129194120880 in words is "one hundred twenty-nine billion, one hundred ninety-four million, one hundred twenty thousand, eight hundred eighty".