3646431064321 has 2 divisors, whose sum is σ = 3646431064322. Its totient is φ = 3646431064320.

The previous prime is 3646431064277. The next prime is 3646431064391. The reversal of 3646431064321 is 1234601346463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3216211824400 + 430219239921 = 1793380^2 + 655911^2 .

It is a cyclic number.

It is not a de Polignac number, because 3646431064321 - 2⁷ = 3646431064193 is a prime.

It is not a weakly prime, because it can be changed into another prime (3646431064391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1823215532160 + 1823215532161.

It is an arithmetic number, because the mean of its divisors is an integer number (1823215532161).

Almost surely, 2^{3646431064321} is an apocalyptic number.

It is an amenable number.

3646431064321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3646431064321 is an equidigital number, since it uses as much as digits as its factorization.

3646431064321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 3646431064321 in words is "three trillion, six hundred forty-six billion, four hundred thirty-one million, sixty-four thousand, three hundred twenty-one".