129661845280 has 48 divisors (see below), whose sum is σ = 334173942144. Its totient is φ = 47149761280.

The previous prime is 129661845223. The next prime is 129661845337. The reversal of 129661845280 is 82548166921.

It is an interprime number because it is at equal distance from previous prime (129661845223) and next prime (129661845337).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36833992 + ... + 36837511.

It is an arithmetic number, because the mean of its divisors is an integer number (6961957128).

Almost surely, 2^129661845280 is an apocalyptic number.

129661845280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129661845280 is an abundant number, since it is smaller than the sum of its proper divisors (204512096864).

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

129661845280 is a wasteful number, since it uses less digits than its factorization.

129661845280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73671529 (or 73671521 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 129661845280 in words is "one hundred twenty-nine billion, six hundred sixty-one million, eight hundred forty-five thousand, two hundred eighty".