129126500375 has 32 divisors (see below), whose sum is σ = 163873082880. Its totient is φ = 101557248000.

The previous prime is 129126500369. The next prime is 129126500383. The reversal of 129126500375 is 573005621921.

It is not a de Polignac number, because 129126500375 - 2⁶ = 129126500311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25381082 + ... + 25386168.

It is an arithmetic number, because the mean of its divisors is an integer number (5121033840).

Almost surely, 2^129126500375 is an apocalyptic number.

129126500375 is a deficient number, since it is larger than the sum of its proper divisors (34746582505).

129126500375 is an equidigital number, since it uses as much as digits as its factorization.

129126500375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492 (or 8482 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 129126500375 in words is "one hundred twenty-nine billion, one hundred twenty-six million, five hundred thousand, three hundred seventy-five".