129252831975 has 60 divisors (see below), whose sum is σ = 239483795320. Its totient is φ = 68916744000.

The previous prime is 129252831973. The next prime is 129252832001. The reversal of 129252831975 is 579138252921.

129252831975 is a `hidden beast` number, since 1 + 2 + 9 + 252 + 8 + 319 + 75 = 666.

It is not a de Polignac number, because 129252831975 - 2¹ = 129252831973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129252831973) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 11842821 + ... + 11853729.

Almost surely, 2^129252831975 is an apocalyptic number.

129252831975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129252831975 is a deficient number, since it is larger than the sum of its proper divisors (110230963345).

129252831975 is a wasteful number, since it uses less digits than its factorization.

129252831975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16782 (or 16768 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The spelling of 129252831975 in words is "one hundred twenty-nine billion, two hundred fifty-two million, eight hundred thirty-one thousand, nine hundred seventy-five".