129182153840 has 80 divisors (see below), whose sum is σ = 307782175680. Its totient is φ = 50394839040.

The previous prime is 129182153833. The next prime is 129182153873. The reversal of 129182153840 is 48351281921.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 129182153791 and 129182153800.

It is a congruent number.

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, 13138046 + ... + 13147874.

It is an arithmetic number, because the mean of its divisors is an integer number (3847277196).

Almost surely, 2^129182153840 is an apocalyptic number.

129182153840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129182153840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153891087840).

129182153840 is an abundant number, since it is smaller than the sum of its proper divisors (178600021840).

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

129182153840 is a wasteful number, since it uses less digits than its factorization.

129182153840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13890 (or 13884 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 129182153840 in words is "one hundred twenty-nine billion, one hundred eighty-two million, one hundred fifty-three thousand, eight hundred forty".