18355006161 has 8 divisors (see below), whose sum is σ = 27192601760. Its totient is φ = 12236670756.

The previous prime is 18355006151. The next prime is 18355006169. The reversal of 18355006161 is 16160055381.

18355006161 is a `hidden beast` number, since 1 + 8 + 35 + 5 + 0 + 0 + 616 + 1 = 666.

It is not a de Polignac number, because 18355006161 - 2¹¹ = 18355004113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18355006169) 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, 339907495 + ... + 339907548.

It is an arithmetic number, because the mean of its divisors is an integer number (3399075220).

Almost surely, 2^18355006161 is an apocalyptic number.

It is an amenable number.

18355006161 is a deficient number, since it is larger than the sum of its proper divisors (8837595599).

18355006161 is an equidigital number, since it uses as much as digits as its factorization.

18355006161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679815052 (or 679815046 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 18355006161 in words is "eighteen billion, three hundred fifty-five million, six thousand, one hundred sixty-one".