129499191925344 has 864 divisors, whose sum is σ = 404616244032000. Its totient is φ = 39231651723264.

The previous prime is 129499191925283. The next prime is 129499191925351. The reversal of 129499191925344 is 443529191994921.

129499191925344 is a `hidden beast` number, since 1 + 2 + 9 + 4 + 9 + 9 + 191 + 92 + 5 + 344 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 196508636887 + ... + 196508637545.

It is an arithmetic number, because the mean of its divisors is an integer number (468305838000).

Almost surely, 2^{129499191925344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129499191925344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202308122016000).

129499191925344 is an abundant number, since it is smaller than the sum of its proper divisors (275117052106656).

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

129499191925344 is a wasteful number, since it uses less digits than its factorization.

129499191925344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 1358 counting only the distinct ones).

The product of its digits is 226748160, while the sum is 72.

The spelling of 129499191925344 in words is "one hundred twenty-nine trillion, four hundred ninety-nine billion, one hundred ninety-one million, nine hundred twenty-five thousand, three hundred forty-four".