47319959721805 has 4 divisors (see below), whose sum is σ = 56783951666172. Its totient is φ = 37855967777440.

The previous prime is 47319959721751. The next prime is 47319959721821. The reversal of 47319959721805 is 50812795991374.

47319959721805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16421192022249 + 30898767699556 = 4052307^2 + 5558666^2 .

It is not a de Polignac number, because 47319959721805 - 2¹¹ = 47319959719757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4731995972176 + ... + 4731995972185.

It is an arithmetic number, because the mean of its divisors is an integer number (14195987916543).

Almost surely, 2^{47319959721805} is an apocalyptic number.

It is an amenable number.

47319959721805 is a deficient number, since it is larger than the sum of its proper divisors (9463991944367).

47319959721805 is an equidigital number, since it uses as much as digits as its factorization.

47319959721805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9463991944366.

The product of its (nonzero) digits is 171460800, while the sum is 70.

The spelling of 47319959721805 in words is "forty-seven trillion, three hundred nineteen billion, nine hundred fifty-nine million, seven hundred twenty-one thousand, eight hundred five".