531425351440 has 20 divisors (see below), whose sum is σ = 1235563942284. Its totient is φ = 212570140544.

The previous prime is 531425351423. The next prime is 531425351461. The reversal of 531425351440 is 44153524135.

It can be written as a sum of positive squares in 2 ways, for example, as 121092864256 + 410332487184 = 347984^2 + 640572^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 531425351440.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3321408367 + ... + 3321408526.

Almost surely, 2^531425351440 is an apocalyptic number.

It is an amenable number.

531425351440 is an abundant number, since it is smaller than the sum of its proper divisors (704138590844).

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

531425351440 is a wasteful number, since it uses less digits than its factorization.

531425351440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642816906 (or 6642816900 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 531425351440 its reverse (44153524135), we get a palindrome (575578875575).

The spelling of 531425351440 in words is "five hundred thirty-one billion, four hundred twenty-five million, three hundred fifty-one thousand, four hundred forty".