47911805185 has 8 divisors (see below), whose sum is σ = 57504883176. Its totient is φ = 38322299520.

The previous prime is 47911805153. The next prime is 47911805189. The reversal of 47911805185 is 58150811974.

It can be written as a sum of positive squares in 4 ways, for example, as 13226840064 + 34684965121 = 115008^2 + 186239^2 .

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

It is not a de Polignac number, because 47911805185 - 2⁵ = 47911805153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47911805189) 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, 863484 + ... + 917293.

It is an arithmetic number, because the mean of its divisors is an integer number (7188110397).

Almost surely, 2^47911805185 is an apocalyptic number.

It is an amenable number.

47911805185 is a deficient number, since it is larger than the sum of its proper divisors (9593077991).

47911805185 is a wasteful number, since it uses less digits than its factorization.

47911805185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786163.

The product of its (nonzero) digits is 403200, while the sum is 49.

The spelling of 47911805185 in words is "forty-seven billion, nine hundred eleven million, eight hundred five thousand, one hundred eighty-five".