129173072976 has 400 divisors, whose sum is σ = 391431553920. Its totient is φ = 41268165120.

The previous prime is 129173072957. The next prime is 129173072981. The reversal of 129173072976 is 679270371921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1185074010 + ... + 1185074118.

Almost surely, 2^129173072976 is an apocalyptic number.

129173072976 is a gapful number since it is divisible by the number (16) 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 129173072976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195715776960).

129173072976 is an abundant number, since it is smaller than the sum of its proper divisors (262258480944).

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

129173072976 is an frugal number, since it uses more digits than its factorization.

129173072976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 54.

The spelling of 129173072976 in words is "one hundred twenty-nine billion, one hundred seventy-three million, seventy-two thousand, nine hundred seventy-six".