47878795477 has 4 divisors (see below), whose sum is σ = 47879262976. Its totient is φ = 47878327980.

The previous prime is 47878795469. The next prime is 47878795501. The reversal of 47878795477 is 77459787874.

47878795477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 47878795477 - 2³ = 47878795469 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 (47878795577) 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, 6453 + ... + 309514.

It is an arithmetic number, because the mean of its divisors is an integer number (11969815744).

Almost surely, 2^47878795477 is an apocalyptic number.

It is an amenable number.

47878795477 is a deficient number, since it is larger than the sum of its proper divisors (467499).

47878795477 is a wasteful number, since it uses less digits than its factorization.

47878795477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467498.

The product of its digits is 774466560, while the sum is 73.

The spelling of 47878795477 in words is "forty-seven billion, eight hundred seventy-eight million, seven hundred ninety-five thousand, four hundred seventy-seven".