18198580667 has 4 divisors (see below), whose sum is σ = 18378764736. Its totient is φ = 18018396600.

The previous prime is 18198580649. The next prime is 18198580711. The reversal of 18198580667 is 76608589181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76608589181 = 29 ⋅2641675489.

It is a cyclic number.

It is not a de Polignac number, because 18198580667 - 2¹⁰ = 18198579643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18198580637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90091883 + ... + 90092084.

It is an arithmetic number, because the mean of its divisors is an integer number (4594691184).

Almost surely, 2^18198580667 is an apocalyptic number.

18198580667 is a deficient number, since it is larger than the sum of its proper divisors (180184069).

18198580667 is a wasteful number, since it uses less digits than its factorization.

18198580667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180184068.

The product of its (nonzero) digits is 5806080, while the sum is 59.

The spelling of 18198580667 in words is "eighteen billion, one hundred ninety-eight million, five hundred eighty thousand, six hundred sixty-seven".