129825340854 has 64 divisors (see below), whose sum is σ = 288967668480. Its totient is φ = 38551848320.

The previous prime is 129825340847. The next prime is 129825340859. The reversal of 129825340854 is 458043528921.

It is a junction number, because it is equal to n+sod(n) for n = 129825340797 and 129825340806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129825340859) 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, 1181812 + ... + 1286984.

It is an arithmetic number, because the mean of its divisors is an integer number (4515119820).

Almost surely, 2^129825340854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129825340854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144483834240).

129825340854 is an abundant number, since it is smaller than the sum of its proper divisors (159142327626).

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

129825340854 is a wasteful number, since it uses less digits than its factorization.

129825340854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105565.

The product of its (nonzero) digits is 2764800, while the sum is 51.

The spelling of 129825340854 in words is "one hundred twenty-nine billion, eight hundred twenty-five million, three hundred forty thousand, eight hundred fifty-four".