47877421521667 has 4 divisors (see below), whose sum is σ = 47895688377216. Its totient is φ = 47859154666120.

The previous prime is 47877421521649. The next prime is 47877421521751. The reversal of 47877421521667 is 76612512477874.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47877421521667 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47877421521607) 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, 9133423843 + ... + 9133429084.

It is an arithmetic number, because the mean of its divisors is an integer number (11973922094304).

Almost surely, 2^{47877421521667} is an apocalyptic number.

47877421521667 is a deficient number, since it is larger than the sum of its proper divisors (18266855549).

47877421521667 is a wasteful number, since it uses less digits than its factorization.

47877421521667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18266855548.

The product of its digits is 221276160, while the sum is 67.

The spelling of 47877421521667 in words is "forty-seven trillion, eight hundred seventy-seven billion, four hundred twenty-one million, five hundred twenty-one thousand, six hundred sixty-seven".