504739910691 has 6 divisors (see below), whose sum is σ = 729068759900. Its totient is φ = 336493273788.

The previous prime is 504739910621. The next prime is 504739910713. The reversal of 504739910691 is 196019937405.

504739910691 is a `hidden beast` number, since 504 + 7 + 39 + 9 + 10 + 6 + 91 = 666.

It is not a de Polignac number, because 504739910691 - 2⁹ = 504739910179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504739910621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28041106141 + ... + 28041106158.

Almost surely, 2^504739910691 is an apocalyptic number.

504739910691 is a deficient number, since it is larger than the sum of its proper divisors (224328849209).

504739910691 is a wasteful number, since it uses less digits than its factorization.

504739910691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56082212305 (or 56082212302 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The spelling of 504739910691 in words is "five hundred four billion, seven hundred thirty-nine million, nine hundred ten thousand, six hundred ninety-one".