543565443401 has 2 divisors, whose sum is σ = 543565443402. Its totient is φ = 543565443400.

The previous prime is 543565443397. The next prime is 543565443419. The reversal of 543565443401 is 104344565345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398982985801 + 144582457600 = 631651^2 + 380240^2 .

It is a cyclic number.

It is not a de Polignac number, because 543565443401 - 2² = 543565443397 is a prime.

It is not a weakly prime, because it can be changed into another prime (543565443451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271782721700 + 271782721701.

It is an arithmetic number, because the mean of its divisors is an integer number (271782721701).

Almost surely, 2^543565443401 is an apocalyptic number.

It is an amenable number.

543565443401 is a deficient number, since it is larger than the sum of its proper divisors (1).

543565443401 is an equidigital number, since it uses as much as digits as its factorization.

543565443401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728000, while the sum is 44.

The spelling of 543565443401 in words is "five hundred forty-three billion, five hundred sixty-five million, four hundred forty-three thousand, four hundred one".