18419548565 has 16 divisors (see below), whose sum is σ = 24116429376. Its totient is φ = 13394054400.

The previous prime is 18419548561. The next prime is 18419548633. The reversal of 18419548565 is 56584591481.

It is not a de Polignac number, because 18419548565 - 2² = 18419548561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18419548565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18419548561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423734 + ... + 465176.

It is an arithmetic number, because the mean of its divisors is an integer number (1507276836).

Almost surely, 2^18419548565 is an apocalyptic number.

It is an amenable number.

18419548565 is a deficient number, since it is larger than the sum of its proper divisors (5696880811).

18419548565 is a wasteful number, since it uses less digits than its factorization.

18419548565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49540.

The product of its digits is 6912000, while the sum is 56.

The spelling of 18419548565 in words is "eighteen billion, four hundred nineteen million, five hundred forty-eight thousand, five hundred sixty-five".