18319874515489 has 8 divisors (see below), whose sum is σ = 18333638797760. Its totient is φ = 18306111556656.

The previous prime is 18319874515429. The next prime is 18319874515529. The reversal of 18319874515489 is 98451547891381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18319874515489 - 2¹¹ = 18319874513441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18319874515429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28292734 + ... + 28933000.

It is an arithmetic number, because the mean of its divisors is an integer number (2291704849720).

Almost surely, 2^{18319874515489} is an apocalyptic number.

It is an amenable number.

18319874515489 is a deficient number, since it is larger than the sum of its proper divisors (13764282271).

18319874515489 is a wasteful number, since it uses less digits than its factorization.

18319874515489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661719.

The product of its digits is 348364800, while the sum is 73.

The spelling of 18319874515489 in words is "eighteen trillion, three hundred nineteen billion, eight hundred seventy-four million, five hundred fifteen thousand, four hundred eighty-nine".