531866380000 has 240 divisors, whose sum is σ = 1397302220160. Its totient is φ = 198777600000.

The previous prime is 531866379959. The next prime is 531866380007. The reversal of 531866380000 is 83668135.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531866380007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17965210 + ... + 17994790.

It is an arithmetic number, because the mean of its divisors is an integer number (5822092584).

Almost surely, 2^531866380000 is an apocalyptic number.

531866380000 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 531866380000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698651110080).

531866380000 is an abundant number, since it is smaller than the sum of its proper divisors (865435840160).

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

531866380000 is a wasteful number, since it uses less digits than its factorization.

531866380000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29671 (or 29648 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 531866380000 in words is "five hundred thirty-one billion, eight hundred sixty-six million, three hundred eighty thousand".