18129409826559 has 16 divisors (see below), whose sum is σ = 24830942687232. Its totient is φ = 11759262455808.

The previous prime is 18129409826531. The next prime is 18129409826569. The reversal of 18129409826559 is 95562890492181.

It is not a de Polignac number, because 18129409826559 - 2¹² = 18129409822463 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18129409826493 and 18129409826502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18129409826509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273387199 + ... + 273453504.

It is an arithmetic number, because the mean of its divisors is an integer number (1551933917952).

Almost surely, 2^{18129409826559} is an apocalyptic number.

18129409826559 is a deficient number, since it is larger than the sum of its proper divisors (6701532860673).

18129409826559 is a wasteful number, since it uses less digits than its factorization.

18129409826559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546841006.

The product of its (nonzero) digits is 111974400, while the sum is 69.

The spelling of 18129409826559 in words is "eighteen trillion, one hundred twenty-nine billion, four hundred nine million, eight hundred twenty-six thousand, five hundred fifty-nine".