18100000169 has 2 divisors, whose sum is σ = 18100000170. Its totient is φ = 18100000168.

The previous prime is 18100000159. The next prime is 18100000183. The reversal of 18100000169 is 96100000181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9957644944 + 8142355225 = 99788^2 + 90235^2 .

It is a cyclic number.

It is not a de Polignac number, because 18100000169 - 2⁸ = 18099999913 is a prime.

It is a super-2 number, since 2×18100000169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18100000159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9050000084 + 9050000085.

It is an arithmetic number, because the mean of its divisors is an integer number (9050000085).

Almost surely, 2^18100000169 is an apocalyptic number.

It is an amenable number.

18100000169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18100000169 is an equidigital number, since it uses as much as digits as its factorization.

18100000169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 18100000169 in words is "eighteen billion, one hundred million, one hundred sixty-nine", and thus it is an aban number.