531435440161 has 16 divisors (see below), whose sum is σ = 539638856064. Its totient is φ = 523298006784.

The previous prime is 531435440153. The next prime is 531435440191. The reversal of 531435440161 is 161044534135.

It is a cyclic number.

It is not a de Polignac number, because 531435440161 - 2³ = 531435440153 is a prime.

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 531435440161.

It is not an unprimeable number, because it can be changed into a prime (531435440191) 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 15 ways as a sum of consecutive naturals, for example, 28278010 + ... + 28296796.

It is an arithmetic number, because the mean of its divisors is an integer number (33727428504).

Almost surely, 2^531435440161 is an apocalyptic number.

It is an amenable number.

531435440161 is a deficient number, since it is larger than the sum of its proper divisors (8203415903).

531435440161 is a wasteful number, since it uses less digits than its factorization.

531435440161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20520.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 531435440161 its reverse (161044534135), we get a palindrome (692479974296).

The spelling of 531435440161 in words is "five hundred thirty-one billion, four hundred thirty-five million, four hundred forty thousand, one hundred sixty-one".