129126485818 has 16 divisors (see below), whose sum is σ = 218584020960. Its totient is φ = 56669930800.

The previous prime is 129126485797. The next prime is 129126485843. The reversal of 129126485818 is 818584621921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101195668 + ... + 101196943.

It is an arithmetic number, because the mean of its divisors is an integer number (13661501310).

Almost surely, 2^129126485818 is an apocalyptic number.

129126485818 is a deficient number, since it is larger than the sum of its proper divisors (89457535142).

129126485818 is a wasteful number, since it uses less digits than its factorization.

129126485818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202392653.

The product of its digits is 2211840, while the sum is 55.

The spelling of 129126485818 in words is "one hundred twenty-nine billion, one hundred twenty-six million, four hundred eighty-five thousand, eight hundred eighteen".