47820811171 has 4 divisors (see below), whose sum is σ = 54652355632. Its totient is φ = 40989266712.

The previous prime is 47820811153. The next prime is 47820811177. The reversal of 47820811171 is 17111802874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17111802874 = 2 ⋅8555901437.

It is a cyclic number.

It is not a de Polignac number, because 47820811171 - 2²¹ = 47818714019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47820811177) 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 3 ways as a sum of consecutive naturals, for example, 3415772220 + ... + 3415772233.

It is an arithmetic number, because the mean of its divisors is an integer number (13663088908).

Almost surely, 2^47820811171 is an apocalyptic number.

47820811171 is a deficient number, since it is larger than the sum of its proper divisors (6831544461).

47820811171 is an equidigital number, since it uses as much as digits as its factorization.

47820811171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6831544460.

The product of its (nonzero) digits is 25088, while the sum is 40.

The spelling of 47820811171 in words is "forty-seven billion, eight hundred twenty million, eight hundred eleven thousand, one hundred seventy-one".