506859987481 has 9 divisors (see below), whose sum is σ = 508982564181. Its totient is φ = 504746234652.

The previous prime is 506859987463. The next prime is 506859987499. The reversal of 506859987481 is 184789958605.

The square root of 506859987481 is 711941.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (506859987463) and next prime (506859987499).

It is not a de Polignac number, because 506859987481 - 2²³ = 506851598873 is a prime.

It is a super-2 number, since 2×506859987481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 506859987481.

It is not an unprimeable number, because it can be changed into a prime (506859982481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 187239130 + ... + 187241836.

Almost surely, 2^506859987481 is an apocalyptic number.

506859987481 is the 711941-st square number.

506859987481 is the 355971-st centered octagonal number.

It is an amenable number.

506859987481 is a deficient number, since it is larger than the sum of its proper divisors (2122576700).

506859987481 is an frugal number, since it uses more digits than its factorization.

506859987481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 174182400, while the sum is 70.

The spelling of 506859987481 in words is "five hundred six billion, eight hundred fifty-nine million, nine hundred eighty-seven thousand, four hundred eighty-one".