5409492166321 has 2 divisors, whose sum is σ = 5409492166322. Its totient is φ = 5409492166320.

The previous prime is 5409492166319. The next prime is 5409492166327. The reversal of 5409492166321 is 1236612949045.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4979752919296 + 429739247025 = 2231536^2 + 655545^2 .

It is a cyclic number.

It is not a de Polignac number, because 5409492166321 - 2¹ = 5409492166319 is a prime.

Together with 5409492166319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5409492166327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2704746083160 + 2704746083161.

It is an arithmetic number, because the mean of its divisors is an integer number (2704746083161).

Almost surely, 2^{5409492166321} is an apocalyptic number.

It is an amenable number.

5409492166321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5409492166321 is an equidigital number, since it uses as much as digits as its factorization.

5409492166321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 5409492166321 in words is "five trillion, four hundred nine billion, four hundred ninety-two million, one hundred sixty-six thousand, three hundred twenty-one".