129774299824 has 80 divisors (see below), whose sum is σ = 283663094400. Its totient is φ = 57098216448.

The previous prime is 129774299821. The next prime is 129774299891. The reversal of 129774299824 is 428992477921.

It is not an unprimeable number, because it can be changed into a prime (129774299821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340362 + ... + 612694.

It is an arithmetic number, because the mean of its divisors is an integer number (3545788680).

Almost surely, 2^129774299824 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 129774299824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141831547200).

129774299824 is an abundant number, since it is smaller than the sum of its proper divisors (153888794576).

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

129774299824 is a wasteful number, since it uses less digits than its factorization.

129774299824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272462 (or 272456 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 64.

The spelling of 129774299824 in words is "one hundred twenty-nine billion, seven hundred seventy-four million, two hundred ninety-nine thousand, eight hundred twenty-four".