2236196185681 has 2 divisors, whose sum is σ = 2236196185682. Its totient is φ = 2236196185680.

The previous prime is 2236196185673. The next prime is 2236196185709. The reversal of 2236196185681 is 1865816916322.

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., 1227406957456 + 1008789228225 = 1107884^2 + 1004385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2236196185681 - 2³ = 2236196185673 is a prime.

It is a super-2 number, since 2×2236196185681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2236196185631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1118098092840 + 1118098092841.

It is an arithmetic number, because the mean of its divisors is an integer number (1118098092841).

Almost surely, 2^{2236196185681} is an apocalyptic number.

It is an amenable number.

2236196185681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2236196185681 is an equidigital number, since it uses as much as digits as its factorization.

2236196185681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 58.

The spelling of 2236196185681 in words is "two trillion, two hundred thirty-six billion, one hundred ninety-six million, one hundred eighty-five thousand, six hundred eighty-one".