531465621144 has 64 divisors (see below), whose sum is σ = 1359704966400. Its totient is φ = 173017278336.

The previous prime is 531465621079. The next prime is 531465621173. The reversal of 531465621144 is 441126564135.

It is a junction number, because it is equal to n+sod(n) for n = 531465621096 and 531465621105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12882502 + ... + 12923690.

It is an arithmetic number, because the mean of its divisors is an integer number (21245390100).

Almost surely, 2^531465621144 is an apocalyptic number.

It is an amenable number.

531465621144 is an abundant number, since it is smaller than the sum of its proper divisors (828239345256).

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

531465621144 is a wasteful number, since it uses less digits than its factorization.

531465621144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53744 (or 53740 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The spelling of 531465621144 in words is "five hundred thirty-one billion, four hundred sixty-five million, six hundred twenty-one thousand, one hundred forty-four".