47778048561 has 4 divisors (see below), whose sum is σ = 63704064752. Its totient is φ = 31852032372.

The previous prime is 47778048553. The next prime is 47778048629. The reversal of 47778048561 is 16584087774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 47778048561 - 2³ = 47778048553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (46778048561) 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, 7963008091 + ... + 7963008096.

It is an arithmetic number, because the mean of its divisors is an integer number (15926016188).

Almost surely, 2^47778048561 is an apocalyptic number.

It is an amenable number.

47778048561 is a deficient number, since it is larger than the sum of its proper divisors (15926016191).

47778048561 is a wasteful number, since it uses less digits than its factorization.

47778048561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15926016190.

The product of its (nonzero) digits is 10536960, while the sum is 57.

The spelling of 47778048561 in words is "forty-seven billion, seven hundred seventy-eight million, forty-eight thousand, five hundred sixty-one".