543555325205401 has 4 divisors (see below), whose sum is σ = 544734404002404. Its totient is φ = 542376246408400.

The previous prime is 543555325205381. The next prime is 543555325205437. The reversal of 543555325205401 is 104502523555345.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152771577606400 + 390783747599001 = 12360080^2 + 19768251^2 .

It is a cyclic number.

It is not a de Polignac number, because 543555325205401 - 2¹⁵ = 543555325172633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543555325205441) 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, 589539397810 + ... + 589539398731.

It is an arithmetic number, because the mean of its divisors is an integer number (136183601000601).

Almost surely, 2^{543555325205401} is an apocalyptic number.

It is an amenable number.

543555325205401 is a deficient number, since it is larger than the sum of its proper divisors (1179078797003).

543555325205401 is a wasteful number, since it uses less digits than its factorization.

543555325205401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179078797002.

The product of its (nonzero) digits is 9000000, while the sum is 49.

The spelling of 543555325205401 in words is "five hundred forty-three trillion, five hundred fifty-five billion, three hundred twenty-five million, two hundred five thousand, four hundred one".