129282261580 has 48 divisors (see below), whose sum is σ = 281292167520. Its totient is φ = 49851906048.

The previous prime is 129282261553. The next prime is 129282261617. The reversal of 129282261580 is 85162282921.

It is a self number, because there is not a number n which added to its sum of digits gives 129282261580.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199612 + ... + 546268.

It is an arithmetic number, because the mean of its divisors is an integer number (5860253490).

Almost surely, 2^129282261580 is an apocalyptic number.

129282261580 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 129282261580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140646083760).

129282261580 is an abundant number, since it is smaller than the sum of its proper divisors (152009905940).

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

129282261580 is a wasteful number, since it uses less digits than its factorization.

129282261580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347338 (or 347336 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 129282261580 in words is "one hundred twenty-nine billion, two hundred eighty-two million, two hundred sixty-one thousand, five hundred eighty".