531042631536 has 80 divisors (see below), whose sum is σ = 1385197127424. Its totient is φ = 175294543872.

The previous prime is 531042631531. The next prime is 531042631577. The reversal of 531042631536 is 635136240135.

It is a junction number, because it is equal to n+sod(n) for n = 531042631494 and 531042631503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531042631531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14892000 + ... + 14927616.

Almost surely, 2^531042631536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531042631536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692598563712).

531042631536 is an abundant number, since it is smaller than the sum of its proper divisors (854154495888).

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

531042631536 is a wasteful number, since it uses less digits than its factorization.

531042631536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38638 (or 38632 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 531042631536 in words is "five hundred thirty-one billion, forty-two million, six hundred thirty-one thousand, five hundred thirty-six".