6434071738321 has 2 divisors, whose sum is σ = 6434071738322. Its totient is φ = 6434071738320.

The previous prime is 6434071738273. The next prime is 6434071738327. The reversal of 6434071738321 is 1238371704346.

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., 5359664859025 + 1074406879296 = 2315095^2 + 1036536^2 .

It is a cyclic number.

It is not a de Polignac number, because 6434071738321 - 2³⁵ = 6399711999953 is a prime.

It is a super-2 number, since 2×6434071738321² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6434071738327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3217035869160 + 3217035869161.

It is an arithmetic number, because the mean of its divisors is an integer number (3217035869161).

Almost surely, 2^{6434071738321} is an apocalyptic number.

It is an amenable number.

6434071738321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6434071738321 is an equidigital number, since it uses as much as digits as its factorization.

6434071738321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 6434071738321 in words is "six trillion, four hundred thirty-four billion, seventy-one million, seven hundred thirty-eight thousand, three hundred twenty-one".