129617507424 has 48 divisors (see below), whose sum is σ = 340281684288. Its totient is φ = 43201299072.

The previous prime is 129617507419. The next prime is 129617507443. The reversal of 129617507424 is 424705716921.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919879 + ... + 1051385.

It is an arithmetic number, because the mean of its divisors is an integer number (7089201756).

Almost surely, 2^129617507424 is an apocalyptic number.

It is an amenable number.

129617507424 is an abundant number, since it is smaller than the sum of its proper divisors (210664176864).

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

129617507424 is a wasteful number, since it uses less digits than its factorization.

129617507424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141787 (or 141779 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 129617507424 in words is "one hundred twenty-nine billion, six hundred seventeen million, five hundred seven thousand, four hundred twenty-four".