18577776858509 has 16 divisors (see below), whose sum is σ = 21532151790720. Its totient is φ = 15865796036160.

The previous prime is 18577776858419. The next prime is 18577776858523. The reversal of 18577776858509 is 90585867777581.

It is not a de Polignac number, because 18577776858509 - 2⁴⁴ = 985590814093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18577776855509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786982049 + ... + 787005654.

It is an arithmetic number, because the mean of its divisors is an integer number (1345759486920).

Almost surely, 2^{18577776858509} is an apocalyptic number.

It is an amenable number.

18577776858509 is a deficient number, since it is larger than the sum of its proper divisors (2954374932211).

18577776858509 is a wasteful number, since it uses less digits than its factorization.

18577776858509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573987780.

The product of its (nonzero) digits is 8297856000, while the sum is 83.

The spelling of 18577776858509 in words is "eighteen trillion, five hundred seventy-seven billion, seven hundred seventy-six million, eight hundred fifty-eight thousand, five hundred nine".