543384400656 has 80 divisors (see below), whose sum is σ = 1430694144000. Its totient is φ = 177682627584.

The previous prime is 543384400651. The next prime is 543384400673. The reversal of 543384400656 is 656004483345.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (543384400651) 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, 41770 + ... + 1043318.

It is an arithmetic number, because the mean of its divisors is an integer number (17883676800).

Almost surely, 2^543384400656 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 543384400656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715347072000).

543384400656 is an abundant number, since it is smaller than the sum of its proper divisors (887309743344).

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

543384400656 is a wasteful number, since it uses less digits than its factorization.

543384400656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001776 (or 1001770 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 543384400656 in words is "five hundred forty-three billion, three hundred eighty-four million, four hundred thousand, six hundred fifty-six".