129757171328 has 48 divisors (see below), whose sum is σ = 274601077350. Its totient is φ = 61062180864.

The previous prime is 129757171319. The next prime is 129757171331. The reversal of 129757171328 is 823171757921.

It can be written as a sum of positive squares in 3 ways, for example, as 127814830144 + 1942341184 = 357512^2 + 44072^2 .

It is a super-2 number, since 2×129757171328² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129757171328.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1716863 + ... + 1790846.

Almost surely, 2^129757171328 is an apocalyptic number.

It is an amenable number.

129757171328 is an abundant number, since it is smaller than the sum of its proper divisors (144843906022).

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

129757171328 is an equidigital number, since it uses as much as digits as its factorization.

129757171328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507757 (or 3507728 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 53.

The spelling of 129757171328 in words is "one hundred twenty-nine billion, seven hundred fifty-seven million, one hundred seventy-one thousand, three hundred twenty-eight".