531866411828 has 24 divisors (see below), whose sum is σ = 953501923080. Its totient is φ = 259437754880.

The previous prime is 531866411821. The next prime is 531866411851. The reversal of 531866411828 is 828114668135.

It can be written as a sum of positive squares in 4 ways, for example, as 2665450384 + 529200961444 = 51628^2 + 727462^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 531866411828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531866411821) 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 7 ways as a sum of consecutive naturals, for example, 7694750 + ... + 7763562.

It is an arithmetic number, because the mean of its divisors is an integer number (39729246795).

Almost surely, 2^531866411828 is an apocalyptic number.

It is an amenable number.

531866411828 is a deficient number, since it is larger than the sum of its proper divisors (421635511252).

531866411828 is a wasteful number, since it uses less digits than its factorization.

531866411828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115987 (or 115985 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 53.

The spelling of 531866411828 in words is "five hundred thirty-one billion, eight hundred sixty-six million, four hundred eleven thousand, eight hundred twenty-eight".