523047855747721 has 4 divisors (see below), whose sum is σ = 523054216543744. Its totient is φ = 523041494951700.

The previous prime is 523047855747673. The next prime is 523047855747727. The reversal of 523047855747721 is 127747558740325.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523047855747721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523047855747727) 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, 3180274665 + ... + 3180439126.

It is an arithmetic number, because the mean of its divisors is an integer number (130763554135936).

Almost surely, 2^{523047855747721} is an apocalyptic number.

It is an amenable number.

523047855747721 is a deficient number, since it is larger than the sum of its proper divisors (6360796023).

523047855747721 is an equidigital number, since it uses as much as digits as its factorization.

523047855747721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360796022.

The product of its (nonzero) digits is 460992000, while the sum is 67.

The spelling of 523047855747721 in words is "five hundred twenty-three trillion, forty-seven billion, eight hundred fifty-five million, seven hundred forty-seven thousand, seven hundred twenty-one".