531745135020 has 192 divisors, whose sum is σ = 1814065505280. Its totient is φ = 128239718400.

The previous prime is 531745134989. The next prime is 531745135133. The reversal of 531745135020 is 20531547135.

531745135020 is a `hidden beast` number, since 5 + 3 + 1 + 74 + 513 + 50 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 914505 + ... + 1378335.

It is an arithmetic number, because the mean of its divisors is an integer number (9448257840).

Almost surely, 2^531745135020 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 531745135020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907032752640).

531745135020 is an abundant number, since it is smaller than the sum of its proper divisors (1282320370260).

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

531745135020 is a wasteful number, since it uses less digits than its factorization.

531745135020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464053 (or 464045 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The spelling of 531745135020 in words is "five hundred thirty-one billion, seven hundred forty-five million, one hundred thirty-five thousand, twenty".