47984497081 has 4 divisors (see below), whose sum is σ = 47996055412. Its totient is φ = 47972938752.

The previous prime is 47984497079. The next prime is 47984497097. The reversal of 47984497081 is 18079448974.

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 15000125625 + 32984371456 = 122475^2 + 181616^2 .

It is a cyclic number.

It is not a de Polignac number, because 47984497081 - 2¹ = 47984497079 is a prime.

It is a super-2 number, since 2×47984497081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47984597081) 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, 5772936 + ... + 5781241.

It is an arithmetic number, because the mean of its divisors is an integer number (11999013853).

Almost surely, 2^47984497081 is an apocalyptic number.

It is an amenable number.

47984497081 is a deficient number, since it is larger than the sum of its proper divisors (11558331).

47984497081 is a wasteful number, since it uses less digits than its factorization.

47984497081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11558330.

The product of its (nonzero) digits is 16257024, while the sum is 61.

The spelling of 47984497081 in words is "forty-seven billion, nine hundred eighty-four million, four hundred ninety-seven thousand, eighty-one".