18461205168459 has 16 divisors (see below), whose sum is σ = 25491682782720. Its totient is φ = 11870030550560.

The previous prime is 18461205168433. The next prime is 18461205168533. The reversal of 18461205168459 is 95486150216481.

It is a cyclic number.

It is not a de Polignac number, because 18461205168459 - 2³¹ = 18459057684811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18461205168409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116384937 + ... + 116543450.

It is an arithmetic number, because the mean of its divisors is an integer number (1593230173920).

Almost surely, 2^{18461205168459} is an apocalyptic number.

18461205168459 is a deficient number, since it is larger than the sum of its proper divisors (7030477614261).

18461205168459 is a wasteful number, since it uses less digits than its factorization.

18461205168459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232929330.

The product of its (nonzero) digits is 16588800, while the sum is 60.

The spelling of 18461205168459 in words is "eighteen trillion, four hundred sixty-one billion, two hundred five million, one hundred sixty-eight thousand, four hundred fifty-nine".