47821784847 has 4 divisors (see below), whose sum is σ = 63762379800. Its totient is φ = 31881189896.

The previous prime is 47821784797. The next prime is 47821784891. The reversal of 47821784847 is 74848712874.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47821784847 - 2¹⁸ = 47821522703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47821784147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7970297472 + ... + 7970297477.

It is an arithmetic number, because the mean of its divisors is an integer number (15940594950).

Almost surely, 2^47821784847 is an apocalyptic number.

47821784847 is a deficient number, since it is larger than the sum of its proper divisors (15940594953).

47821784847 is a wasteful number, since it uses less digits than its factorization.

47821784847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15940594952.

The product of its digits is 22478848, while the sum is 60.

The spelling of 47821784847 in words is "forty-seven billion, eight hundred twenty-one million, seven hundred eighty-four thousand, eight hundred forty-seven".