129412437987840 has 160 divisors (see below), whose sum is σ = 472817586130560. Its totient is φ = 29579985813504.

The previous prime is 129412437987793. The next prime is 129412437987923. The reversal of 129412437987840 is 48789734214921.

It is a tau number, because it is divible by the number of its divisors (160).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203558945 + ... + 1203666464.

It is an arithmetic number, because the mean of its divisors is an integer number (2955109913316).

Almost surely, 2^{129412437987840} is an apocalyptic number.

129412437987840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129412437987840 is an abundant number, since it is smaller than the sum of its proper divisors (343405148142720).

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

129412437987840 is an equidigital number, since it uses as much as digits as its factorization.

129412437987840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407225442 (or 2407225426 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 69.

The spelling of 129412437987840 in words is "one hundred twenty-nine trillion, four hundred twelve billion, four hundred thirty-seven million, nine hundred eighty-seven thousand, eight hundred forty".