129936172950 has 288 divisors, whose sum is σ = 379035740160. Its totient is φ = 32696352000.

The previous prime is 129936172943. The next prime is 129936172963. The reversal of 129936172950 is 59271639921.

129936172950 is a `hidden beast` number, since 1 + 299 + 3 + 61 + 7 + 295 + 0 = 666.

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 143 ways as a sum of consecutive naturals, for example, 70348927 + ... + 70350773.

It is an arithmetic number, because the mean of its divisors is an integer number (1316096320).

Almost surely, 2^129936172950 is an apocalyptic number.

129936172950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129936172950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189517870080).

129936172950 is an abundant number, since it is smaller than the sum of its proper divisors (249099567210).

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

129936172950 is a wasteful number, since it uses less digits than its factorization.

129936172950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981 (or 1929 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The spelling of 129936172950 in words is "one hundred twenty-nine billion, nine hundred thirty-six million, one hundred seventy-two thousand, nine hundred fifty".