47637705647 has 4 divisors (see below), whose sum is σ = 54443092176. Its totient is φ = 40832319120.

The previous prime is 47637705641. The next prime is 47637705653. The reversal of 47637705647 is 74650773674.

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

It is an interprime number because it is at equal distance from previous prime (47637705641) and next prime (47637705653).

It is a cyclic number.

It is not a de Polignac number, because 47637705647 - 2²⁴ = 47620928431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47637705592 and 47637705601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47637705641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3402693254 + ... + 3402693267.

It is an arithmetic number, because the mean of its divisors is an integer number (13610773044).

Almost surely, 2^47637705647 is an apocalyptic number.

47637705647 is a deficient number, since it is larger than the sum of its proper divisors (6805386529).

47637705647 is an equidigital number, since it uses as much as digits as its factorization.

47637705647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6805386528.

The product of its (nonzero) digits is 20744640, while the sum is 56.

The spelling of 47637705647 in words is "forty-seven billion, six hundred thirty-seven million, seven hundred five thousand, six hundred forty-seven".