3648709432321 has 2 divisors, whose sum is σ = 3648709432322. Its totient is φ = 3648709432320.

The previous prime is 3648709432297. The next prime is 3648709432331. The reversal of 3648709432321 is 1232349078463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1881766650625 + 1766942781696 = 1371775^2 + 1329264^2 .

It is a cyclic number.

It is not a de Polignac number, because 3648709432321 - 2⁵ = 3648709432289 is a prime.

It is not a weakly prime, because it can be changed into another prime (3648709432331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1824354716160 + 1824354716161.

It is an arithmetic number, because the mean of its divisors is an integer number (1824354716161).

Almost surely, 2^{3648709432321} is an apocalyptic number.

It is an amenable number.

3648709432321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3648709432321 is an equidigital number, since it uses as much as digits as its factorization.

3648709432321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 52.

The spelling of 3648709432321 in words is "three trillion, six hundred forty-eight billion, seven hundred nine million, four hundred thirty-two thousand, three hundred twenty-one".