2543468261 has 4 divisors (see below), whose sum is σ = 2585164524. Its totient is φ = 2501772000.

The previous prime is 2543468183. The next prime is 2543468273. The reversal of 2543468261 is 1628643452.

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 763472161 + 1779996100 = 27631^2 + 42190^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543468261 - 2¹⁴ = 2543451877 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 (2543468281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20848040 + ... + 20848161.

It is an arithmetic number, because the mean of its divisors is an integer number (646291131).

Almost surely, 2^2543468261 is an apocalyptic number.

It is an amenable number.

2543468261 is a deficient number, since it is larger than the sum of its proper divisors (41696263).

2543468261 is an equidigital number, since it uses as much as digits as its factorization.

2543468261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41696262.

The product of its digits is 276480, while the sum is 41.

The square root of 2543468261 is about 50432.8093704882. The cubic root of 2543468261 is about 1365.0297212955.

The spelling of 2543468261 in words is "two billion, five hundred forty-three million, four hundred sixty-eight thousand, two hundred sixty-one".