47440781809 has 8 divisors (see below), whose sum is σ = 47671727432. Its totient is φ = 47210342400.

The previous prime is 47440781777. The next prime is 47440781819. The reversal of 47440781809 is 90818704474.

It is a happy number.

47440781809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9965629584 + 37475152225 = 99828^2 + 193585^2 .

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 47440781809 - 2⁵ = 47440781777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47440781819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62017 + ... + 314209.

It is an arithmetic number, because the mean of its divisors is an integer number (5958965929).

Almost surely, 2^47440781809 is an apocalyptic number.

It is an amenable number.

47440781809 is a deficient number, since it is larger than the sum of its proper divisors (230945623).

47440781809 is a wasteful number, since it uses less digits than its factorization.

47440781809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253107.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 47440781809 in words is "forty-seven billion, four hundred forty million, seven hundred eighty-one thousand, eight hundred nine".