129199718280 has 64 divisors (see below), whose sum is σ = 387900316800. Its totient is φ = 34426488320.

The previous prime is 129199718279. The next prime is 129199718369. The reversal of 129199718280 is 82817991921.

It is a self number, because there is not a number n which added to its sum of digits gives 129199718280.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262956 + ... + 572315.

It is an arithmetic number, because the mean of its divisors is an integer number (6060942450).

Almost surely, 2^129199718280 is an apocalyptic number.

129199718280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129199718280 is an abundant number, since it is smaller than the sum of its proper divisors (258700598520).

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

129199718280 is a wasteful number, since it uses less digits than its factorization.

129199718280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836574 (or 836570 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 57.

The spelling of 129199718280 in words is "one hundred twenty-nine billion, one hundred ninety-nine million, seven hundred eighteen thousand, two hundred eighty".