243801847819 has 6 divisors (see below), whose sum is σ = 257308875780. Its totient is φ = 230970171276.

The previous prime is 243801847777. The next prime is 243801847837. The reversal of 243801847819 is 918748108342.

243801847819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243801847819 - 2¹³ = 243801839627 is a prime.

It is a super-2 number, since 2×243801847819² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243801847819.

It is not an unprimeable number, because it can be changed into a prime (243801847879) 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 5 ways as a sum of consecutive naturals, for example, 337675329 + ... + 337676050.

It is an arithmetic number, because the mean of its divisors is an integer number (42884812630).

Almost surely, 2^243801847819 is an apocalyptic number.

243801847819 is a deficient number, since it is larger than the sum of its proper divisors (13507027961).

243801847819 is an equidigital number, since it uses as much as digits as its factorization.

243801847819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675351417 (or 675351398 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 243801847819 in words is "two hundred forty-three billion, eight hundred one million, eight hundred forty-seven thousand, eight hundred nineteen".