129320418570 has 64 divisors (see below), whose sum is σ = 354756188160. Its totient is φ = 29554890048.

The previous prime is 129320418553. The next prime is 129320418571. The reversal of 129320418570 is 75814023921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (129320418571) 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, 1649889 + ... + 1726491.

It is an arithmetic number, because the mean of its divisors is an integer number (5543065440).

Almost surely, 2^129320418570 is an apocalyptic number.

129320418570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129320418570 is an abundant number, since it is smaller than the sum of its proper divisors (225435769590).

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

129320418570 is a wasteful number, since it uses less digits than its factorization.

129320418570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84659.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 129320418570 in words is "one hundred twenty-nine billion, three hundred twenty million, four hundred eighteen thousand, five hundred seventy".