531909810328 has 32 divisors (see below), whose sum is σ = 1100244972960. Its totient is φ = 239509105920.

The previous prime is 531909810317. The next prime is 531909810373. The reversal of 531909810328 is 823018909135.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62367900 + ... + 62376427.

It is an arithmetic number, because the mean of its divisors is an integer number (34382655405).

Almost surely, 2^531909810328 is an apocalyptic number.

It is an amenable number.

531909810328 is an abundant number, since it is smaller than the sum of its proper divisors (568335162632).

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

531909810328 is a wasteful number, since it uses less digits than its factorization.

531909810328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124744387 (or 124744383 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 531909810328 in words is "five hundred thirty-one billion, nine hundred nine million, eight hundred ten thousand, three hundred twenty-eight".