505712678 has 4 divisors (see below), whose sum is σ = 758569020. Its totient is φ = 252856338.

The previous prime is 505712671. The next prime is 505712681. The reversal of 505712678 is 876217505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 876217505 = 5 ⋅175243501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505712671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126428168 + ... + 126428171.

It is an arithmetic number, because the mean of its divisors is an integer number (189642255).

Almost surely, 2^505712678 is an apocalyptic number.

505712678 is a deficient number, since it is larger than the sum of its proper divisors (252856342).

505712678 is a wasteful number, since it uses less digits than its factorization.

505712678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252856341.

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 505712678 is about 22488.0563410892. The cubic root of 505712678 is about 796.7118567839.

The spelling of 505712678 in words is "five hundred five million, seven hundred twelve thousand, six hundred seventy-eight".