546381987840 has 640 divisors, whose sum is σ = 2110197640320. Its totient is φ = 134451560448.

The previous prime is 546381987707. The next prime is 546381987847. The reversal of 546381987840 is 48789183645.

546381987840 is a `hidden beast` number, since 5 + 463 + 8 + 1 + 98 + 7 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (546381987847) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 172521937 + ... + 172525103.

It is an arithmetic number, because the mean of its divisors is an integer number (3297183813).

Almost surely, 2^546381987840 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 546381987840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055098820160).

546381987840 is an abundant number, since it is smaller than the sum of its proper divisors (1563815652480).

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

546381987840 is an equidigital number, since it uses as much as digits as its factorization.

546381987840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227 (or 3190 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 546381987840 in words is "five hundred forty-six billion, three hundred eighty-one million, nine hundred eighty-seven thousand, eight hundred forty".