543421607261 has 10 divisors (see below), whose sum is σ = 588705186582. Its totient is φ = 501619918800.

The previous prime is 543421607207. The next prime is 543421607291. The reversal of 543421607261 is 162706124345.

It can be written as a sum of positive squares in 5 ways, for example, as 541821127225 + 1600480036 = 736085^2 + 40006^2 .

It is not a de Polignac number, because 543421607261 - 2³⁸ = 268543700317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543421607291) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9484790 + ... + 9541911.

Almost surely, 2^543421607261 is an apocalyptic number.

It is an amenable number.

543421607261 is a deficient number, since it is larger than the sum of its proper divisors (45283579321).

543421607261 is an frugal number, since it uses more digits than its factorization.

543421607261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19026753 (or 19026714 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 543421607261 in words is "five hundred forty-three billion, four hundred twenty-one million, six hundred seven thousand, two hundred sixty-one".