18026416728779 has 4 divisors (see below), whose sum is σ = 18061832086320. Its totient is φ = 17991001371240.

The previous prime is 18026416728751. The next prime is 18026416728797. The reversal of 18026416728779 is 97782761462081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18026416728779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18026416728739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17707678007 + ... + 17707679024.

It is an arithmetic number, because the mean of its divisors is an integer number (4515458021580).

Almost surely, 2^{18026416728779} is an apocalyptic number.

18026416728779 is a deficient number, since it is larger than the sum of its proper divisors (35415357541).

18026416728779 is an equidigital number, since it uses as much as digits as its factorization.

18026416728779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35415357540.

The product of its (nonzero) digits is 113799168, while the sum is 68.

The spelling of 18026416728779 in words is "eighteen trillion, twenty-six billion, four hundred sixteen million, seven hundred twenty-eight thousand, seven hundred seventy-nine".