5665343236321 has 2 divisors, whose sum is σ = 5665343236322. Its totient is φ = 5665343236320.

The previous prime is 5665343236307. The next prime is 5665343236327. The reversal of 5665343236321 is 1236323435665.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5536307820096 + 129035416225 = 2352936^2 + 359215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5665343236321 is a prime.

It is a super-2 number, since 2×5665343236321² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5665343236327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832671618160 + 2832671618161.

It is an arithmetic number, because the mean of its divisors is an integer number (2832671618161).

Almost surely, 2^{5665343236321} is an apocalyptic number.

It is an amenable number.

5665343236321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665343236321 is an equidigital number, since it uses as much as digits as its factorization.

5665343236321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6998400, while the sum is 49.

The spelling of 5665343236321 in words is "five trillion, six hundred sixty-five billion, three hundred forty-three million, two hundred thirty-six thousand, three hundred twenty-one".