129299617744 has 20 divisors (see below), whose sum is σ = 273292374240. Its totient is φ = 58772553440.

The previous prime is 129299617723. The next prime is 129299617771. The reversal of 129299617744 is 447716992921.

It is a super-2 number, since 2×129299617744² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367328284 + ... + 367328635.

It is an arithmetic number, because the mean of its divisors is an integer number (13664618712).

Almost surely, 2^129299617744 is an apocalyptic number.

It is an amenable number.

129299617744 is an abundant number, since it is smaller than the sum of its proper divisors (143992756496).

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

129299617744 is a wasteful number, since it uses less digits than its factorization.

129299617744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734656938 (or 734656932 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 61.

The spelling of 129299617744 in words is "one hundred twenty-nine billion, two hundred ninety-nine million, six hundred seventeen thousand, seven hundred forty-four".