505517926797 has 12 divisors (see below), whose sum is σ = 786361219644. Its totient is φ = 311087954880.

The previous prime is 505517926783. The next prime is 505517926819. The reversal of 505517926797 is 797629715505.

505517926797 is a `hidden beast` number, since 5 + 0 + 5 + 517 + 9 + 26 + 7 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 228451497156 + 277066429641 = 477966^2 + 526371^2 .

It is not a de Polignac number, because 505517926797 - 2⁸ = 505517926541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505517926297) 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 11 ways as a sum of consecutive naturals, for example, 2160332904 + ... + 2160333137.

It is an arithmetic number, because the mean of its divisors is an integer number (65530101637).

Almost surely, 2^505517926797 is an apocalyptic number.

It is an amenable number.

505517926797 is a deficient number, since it is larger than the sum of its proper divisors (280843292847).

505517926797 is a wasteful number, since it uses less digits than its factorization.

505517926797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320666060 (or 4320666057 counting only the distinct ones).

The product of its (nonzero) digits is 41674500, while the sum is 63.

The spelling of 505517926797 in words is "five hundred five billion, five hundred seventeen million, nine hundred twenty-six thousand, seven hundred ninety-seven".