2491443543 has 8 divisors (see below), whose sum is σ = 3347283456. Its totient is φ = 1648283000.

The previous prime is 2491443511. The next prime is 2491443553. The reversal of 2491443543 is 3453441942.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2491443543 - 2⁵ = 2491443511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491443553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3169383 + ... + 3170168.

It is an arithmetic number, because the mean of its divisors is an integer number (418410432).

Almost surely, 2^2491443543 is an apocalyptic number.

2491443543 is a deficient number, since it is larger than the sum of its proper divisors (855839913).

2491443543 is a wasteful number, since it uses less digits than its factorization.

2491443543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6339685.

The product of its digits is 207360, while the sum is 39.

The square root of 2491443543 is about 49914.3620914863. The cubic root of 2491443543 is about 1355.6586519295.

The spelling of 2491443543 in words is "two billion, four hundred ninety-one million, four hundred forty-three thousand, five hundred forty-three".