3642445891349 has 2 divisors, whose sum is σ = 3642445891350. Its totient is φ = 3642445891348.

The previous prime is 3642445891277. The next prime is 3642445891411. The reversal of 3642445891349 is 9431985442463.

It is an a-pointer prime, because the next prime (3642445891411) can be obtained adding 3642445891349 to its sum of digits (62).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2016451120324 + 1625994771025 = 1420018^2 + 1275145^2 .

It is a cyclic number.

It is not a de Polignac number, because 3642445891349 - 2⁸ = 3642445891093 is a prime.

It is a super-2 number, since 2×3642445891349² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3642445891291 and 3642445891300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3642445891649) 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, 1821222945674 + 1821222945675.

It is an arithmetic number, because the mean of its divisors is an integer number (1821222945675).

Almost surely, 2^{3642445891349} is an apocalyptic number.

It is an amenable number.

3642445891349 is a deficient number, since it is larger than the sum of its proper divisors (1).

3642445891349 is an equidigital number, since it uses as much as digits as its factorization.

3642445891349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 89579520, while the sum is 62.

The spelling of 3642445891349 in words is "three trillion, six hundred forty-two billion, four hundred forty-five million, eight hundred ninety-one thousand, three hundred forty-nine".