129870311850 has 96 divisors (see below), whose sum is σ = 357970213440. Its totient is φ = 34621888320.

The previous prime is 129870311833. The next prime is 129870311861. The reversal of 129870311850 is 58113078921.

129870311850 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 129870311796 and 129870311805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5316264 + ... + 5340636.

It is an arithmetic number, because the mean of its divisors is an integer number (3728856390).

Almost surely, 2^129870311850 is an apocalyptic number.

129870311850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129870311850 is an abundant number, since it is smaller than the sum of its proper divisors (228099901590).

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

129870311850 is a wasteful number, since it uses less digits than its factorization.

129870311850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28341 (or 28330 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 129870311850 in words is "one hundred twenty-nine billion, eight hundred seventy million, three hundred eleven thousand, eight hundred fifty".