47988218917 has 4 divisors (see below), whose sum is σ = 47989078956. Its totient is φ = 47987358880.

The previous prime is 47988218909. The next prime is 47988218933. The reversal of 47988218917 is 71981288974.

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 10339025761 + 37649193156 = 101681^2 + 194034^2 .

It is a cyclic number.

It is not a de Polignac number, because 47988218917 - 2³ = 47988218909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47988218617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340048 + ... + 460009.

It is an arithmetic number, because the mean of its divisors is an integer number (11997269739).

Almost surely, 2^47988218917 is an apocalyptic number.

It is an amenable number.

47988218917 is a deficient number, since it is larger than the sum of its proper divisors (860039).

47988218917 is an equidigital number, since it uses as much as digits as its factorization.

47988218917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860038.

The product of its digits is 16257024, while the sum is 64.

The spelling of 47988218917 in words is "forty-seven billion, nine hundred eighty-eight million, two hundred eighteen thousand, nine hundred seventeen".