509880255481 has 9 divisors (see below), whose sum is σ = 514679536623. Its totient is φ = 505125336600.

The previous prime is 509880255473. The next prime is 509880255509. The reversal of 509880255481 is 184552088905.

The square root of 509880255481 is 714059.

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

It can be written as a sum of positive squares in only one way, i.e., 355384091881 + 154496163600 = 596141^2 + 393060^2 .

It is not a de Polignac number, because 509880255481 - 2³ = 509880255473 is a prime.

It is a super-2 number, since 2×509880255481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509880255421) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 77829156 + ... + 77835706.

Almost surely, 2^509880255481 is an apocalyptic number.

509880255481 is the 714059-th square number.

509880255481 is the 357030-th centered octagonal number.

It is an amenable number.

509880255481 is a deficient number, since it is larger than the sum of its proper divisors (4799281142).

509880255481 is an frugal number, since it uses more digits than its factorization.

509880255481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13320 (or 6660 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 55.

The spelling of 509880255481 in words is "five hundred nine billion, eight hundred eighty million, two hundred fifty-five thousand, four hundred eighty-one".