129284722320 has 160 divisors (see below), whose sum is σ = 438928156800. Its totient is φ = 31284498432.

The previous prime is 129284722319. The next prime is 129284722321. The reversal of 129284722320 is 23227482921.

It is an interprime number because it is at equal distance from previous prime (129284722319) and next prime (129284722321).

It is not an unprimeable number, because it can be changed into a prime (129284722321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167085 + ... + 535244.

It is an arithmetic number, because the mean of its divisors is an integer number (2743300980).

Almost surely, 2^129284722320 is an apocalyptic number.

129284722320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129284722320 is an abundant number, since it is smaller than the sum of its proper divisors (309643434480).

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

129284722320 is a wasteful number, since it uses less digits than its factorization.

129284722320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702417 (or 702411 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 129284722320 in words is "one hundred twenty-nine billion, two hundred eighty-four million, seven hundred twenty-two thousand, three hundred twenty".