129740749880 has 256 divisors, whose sum is σ = 366142464000. Its totient is φ = 40372992000.

The previous prime is 129740749837. The next prime is 129740749883. The reversal of 129740749880 is 88947047921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129740749883) 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 63 ways as a sum of consecutive naturals, for example, 16653026 + ... + 16660814.

It is an arithmetic number, because the mean of its divisors is an integer number (1430244000).

Almost surely, 2^129740749880 is an apocalyptic number.

129740749880 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 129740749880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183071232000).

129740749880 is an abundant number, since it is smaller than the sum of its proper divisors (236401714120).

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

129740749880 is a wasteful number, since it uses less digits than its factorization.

129740749880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7958 (or 7954 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 129740749880 in words is "one hundred twenty-nine billion, seven hundred forty million, seven hundred forty-nine thousand, eight hundred eighty".