129545454420 has 144 divisors (see below), whose sum is σ = 396477244800. Its totient is φ = 34236818688.

The previous prime is 129545454413. The next prime is 129545454443. The reversal of 129545454420 is 24454545921.

129545454420 is a `hidden beast` number, since 1 + 2 + 9 + 54 + 54 + 544 + 2 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12519769 + ... + 12530111.

It is an arithmetic number, because the mean of its divisors is an integer number (2753314200).

Almost surely, 2^129545454420 is an apocalyptic number.

129545454420 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 129545454420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198238622400).

129545454420 is an abundant number, since it is smaller than the sum of its proper divisors (266931790380).

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

129545454420 is a wasteful number, since it uses less digits than its factorization.

129545454420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10974 (or 10969 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 129545454420 in words is "one hundred twenty-nine billion, five hundred forty-five million, four hundred fifty-four thousand, four hundred twenty".