47168572051721 has 4 divisors (see below), whose sum is σ = 47177517357972. Its totient is φ = 47159626745472.

The previous prime is 47168572051717. The next prime is 47168572051739. The reversal of 47168572051721 is 12715027586174.

47168572051721 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.

It can be written as a sum of positive squares in 2 ways, for example, as 12304211845696 + 34864360206025 = 3507736^2 + 5904605^2 .

It is a cyclic number.

It is not a de Polignac number, because 47168572051721 - 2² = 47168572051717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47168572851721) 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, 4472645216 + ... + 4472655761.

It is an arithmetic number, because the mean of its divisors is an integer number (11794379339493).

Almost surely, 2^{47168572051721} is an apocalyptic number.

It is an amenable number.

47168572051721 is a deficient number, since it is larger than the sum of its proper divisors (8945306251).

47168572051721 is an equidigital number, since it uses as much as digits as its factorization.

47168572051721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8945306250.

The product of its (nonzero) digits is 6585600, while the sum is 56.

The spelling of 47168572051721 in words is "forty-seven trillion, one hundred sixty-eight billion, five hundred seventy-two million, fifty-one thousand, seven hundred twenty-one".