129271887936 has 189 divisors, whose sum is σ = 377616437679. Its totient is φ = 42282374400.

The previous prime is 129271887929. The next prime is 129271887937. The reversal of 129271887936 is 639788172921.

The square root of 129271887936 is 359544.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×129271887936² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129271887937) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 612662871 + ... + 612663081.

Almost surely, 2^129271887936 is an apocalyptic number.

129271887936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

129271887936 is the 359544-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129271887936

129271887936 is an abundant number, since it is smaller than the sum of its proper divisors (248344549743).

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

129271887936 is an frugal number, since it uses more digits than its factorization.

129271887936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582 (or 287 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 129271887936 in words is "one hundred twenty-nine billion, two hundred seventy-one million, eight hundred eighty-seven thousand, nine hundred thirty-six".