531809280000 has 560 divisors, whose sum is σ = 1969425332160. Its totient is φ = 141778944000.

The previous prime is 531809279987. The next prime is 531809280043. The reversal of 531809280000 is 82908135.

It is a super-2 number, since 2×531809280000² (a number of 24 digits) contains 22 as substring.

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 39 ways as a sum of consecutive naturals, for example, 138238077 + ... + 138241923.

Almost surely, 2^531809280000 is an apocalyptic number.

531809280000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531809280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984712666080).

531809280000 is an abundant number, since it is smaller than the sum of its proper divisors (1437616052160).

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

531809280000 is an frugal number, since it uses more digits than its factorization.

531809280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902 (or 3857 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 531809280000 in words is "five hundred thirty-one billion, eight hundred nine million, two hundred eighty thousand".