504668451991 has 8 divisors (see below), whose sum is σ = 552000038400. Its totient is φ = 457578971640.

The previous prime is 504668451923. The next prime is 504668452003. The reversal of 504668451991 is 199154866405.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 504668451991 - 2⁹ = 504668451479 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 (504668452991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60522151 + ... + 60530488.

It is an arithmetic number, because the mean of its divisors is an integer number (69000004800).

Almost surely, 2^504668451991 is an apocalyptic number.

504668451991 is a deficient number, since it is larger than the sum of its proper divisors (47331586409).

504668451991 is a wasteful number, since it uses less digits than its factorization.

504668451991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121053029.

The product of its (nonzero) digits is 9331200, while the sum is 58.

It can be divided in two parts, 504668 and 451991, that added together give a palindrome (956659).

The spelling of 504668451991 in words is "five hundred four billion, six hundred sixty-eight million, four hundred fifty-one thousand, nine hundred ninety-one".