543409358561 has 4 divisors (see below), whose sum is σ = 544304596992. Its totient is φ = 542514120132.

The previous prime is 543409358533. The next prime is 543409358587. The reversal of 543409358561 is 165853904345.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-543409358561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543409358861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447618305 + ... + 447619518.

It is an arithmetic number, because the mean of its divisors is an integer number (136076149248).

Almost surely, 2^543409358561 is an apocalyptic number.

It is an amenable number.

543409358561 is a deficient number, since it is larger than the sum of its proper divisors (895238431).

543409358561 is an equidigital number, since it uses as much as digits as its factorization.

543409358561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895238430.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 543409358561 in words is "five hundred forty-three billion, four hundred nine million, three hundred fifty-eight thousand, five hundred sixty-one".