531284539680 has 72 divisors (see below), whose sum is σ = 1813008496572. Its totient is φ = 141675876864.

The previous prime is 531284539657. The next prime is 531284539693. The reversal of 531284539680 is 86935482135.

531284539680 is a `hidden beast` number, since 5 + 3 + 1 + 28 + 4 + 539 + 6 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 531283547664 + 992016 = 728892^2 + 996^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184472359 + ... + 184475238.

Almost surely, 2^531284539680 is an apocalyptic number.

It is an amenable number.

531284539680 is an abundant number, since it is smaller than the sum of its proper divisors (1281723956892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531284539680 is a wasteful number, since it uses less digits than its factorization.

531284539680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368947618 (or 368947607 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 531284539680 in words is "five hundred thirty-one billion, two hundred eighty-four million, five hundred thirty-nine thousand, six hundred eighty".