3611016595981 has 2 divisors, whose sum is σ = 3611016595982. Its totient is φ = 3611016595980.

The previous prime is 3611016595919. The next prime is 3611016595993. The reversal of 3611016595981 is 1895956101163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3163094263081 + 447922332900 = 1778509^2 + 669270^2 .

It is an emirp because it is prime and its reverse (1895956101163) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3611016595981 is a prime.

It is a super-2 number, since 2×3611016595981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3611016505981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1805508297990 + 1805508297991.

It is an arithmetic number, because the mean of its divisors is an integer number (1805508297991).

Almost surely, 2^{3611016595981} is an apocalyptic number.

It is an amenable number.

3611016595981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3611016595981 is an equidigital number, since it uses as much as digits as its factorization.

3611016595981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1749600, while the sum is 55.

The spelling of 3611016595981 in words is "three trillion, six hundred eleven billion, sixteen million, five hundred ninety-five thousand, nine hundred eighty-one".