2185189004069 has 2 divisors, whose sum is σ = 2185189004070. Its totient is φ = 2185189004068.

The previous prime is 2185189004059. The next prime is 2185189004081. The reversal of 2185189004069 is 9604009815812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166022030625 + 1019166973444 = 1079825^2 + 1009538^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185189004069 - 2⁸ = 2185189003813 is a prime.

It is a super-2 number, since 2×2185189004069² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2185189004069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2185189004059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092594502034 + 1092594502035.

It is an arithmetic number, because the mean of its divisors is an integer number (1092594502035).

Almost surely, 2^{2185189004069} is an apocalyptic number.

It is an amenable number.

2185189004069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185189004069 is an equidigital number, since it uses as much as digits as its factorization.

2185189004069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 2185189004069 in words is "two trillion, one hundred eighty-five billion, one hundred eighty-nine million, four thousand, sixty-nine".