18163255776101 has 2 divisors, whose sum is σ = 18163255776102. Its totient is φ = 18163255776100.

The previous prime is 18163255776089. The next prime is 18163255776199. The reversal of 18163255776101 is 10167755236181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17760754351201 + 402501424900 = 4214351^2 + 634430^2 .

It is a cyclic number.

It is not a de Polignac number, because 18163255776101 - 2¹⁴ = 18163255759717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18163255775101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9081627888050 + 9081627888051.

It is an arithmetic number, because the mean of its divisors is an integer number (9081627888051).

Almost surely, 2^{18163255776101} is an apocalyptic number.

It is an amenable number.

18163255776101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18163255776101 is an equidigital number, since it uses as much as digits as its factorization.

18163255776101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 53.

The spelling of 18163255776101 in words is "eighteen trillion, one hundred sixty-three billion, two hundred fifty-five million, seven hundred seventy-six thousand, one hundred one".