18031641169 has 2 divisors, whose sum is σ = 18031641170. Its totient is φ = 18031641168.

The previous prime is 18031641119. The next prime is 18031641181. The reversal of 18031641169 is 96114613081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16611858769 + 1419782400 = 128887^2 + 37680^2 .

It is a cyclic number.

It is not a de Polignac number, because 18031641169 - 2¹¹ = 18031639121 is a prime.

It is a super-2 number, since 2×18031641169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18031641109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9015820584 + 9015820585.

It is an arithmetic number, because the mean of its divisors is an integer number (9015820585).

Almost surely, 2^18031641169 is an apocalyptic number.

It is an amenable number.

18031641169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18031641169 is an equidigital number, since it uses as much as digits as its factorization.

18031641169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 18031641169 in words is "eighteen billion, thirty-one million, six hundred forty-one thousand, one hundred sixty-nine".