18345573517789 has 16 divisors (see below), whose sum is σ = 21829838800896. Its totient is φ = 15089750294400.

The previous prime is 18345573517729. The next prime is 18345573517801. The reversal of 18345573517789 is 98771537554381.

It is a cyclic number.

It is not a de Polignac number, because 18345573517789 - 2¹¹ = 18345573515741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345573517729) 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, 523932157 + ... + 523967170.

It is an arithmetic number, because the mean of its divisors is an integer number (1364364925056).

Almost surely, 2^{18345573517789} is an apocalyptic number.

It is an amenable number.

18345573517789 is a deficient number, since it is larger than the sum of its proper divisors (3484265283107).

18345573517789 is a wasteful number, since it uses less digits than its factorization.

18345573517789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047899436.

The product of its digits is 889056000, while the sum is 73.

The spelling of 18345573517789 in words is "eighteen trillion, three hundred forty-five billion, five hundred seventy-three million, five hundred seventeen thousand, seven hundred eighty-nine".