609166543680 has 448 divisors, whose sum is σ = 2223125856000. Its totient is φ = 156905496576.

The previous prime is 609166543669. The next prime is 609166543721. The reversal of 609166543680 is 86345661906.

609166543680 is a `hidden beast` number, since 6 + 0 + 9 + 16 + 6 + 543 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44428666 + ... + 44442374.

It is an arithmetic number, because the mean of its divisors is an integer number (4962334500).

Almost surely, 2^609166543680 is an apocalyptic number.

609166543680 is a gapful number since it is divisible by the number (60) 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 609166543680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111562928000).

609166543680 is an abundant number, since it is smaller than the sum of its proper divisors (1613959312320).

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

609166543680 is a wasteful number, since it uses less digits than its factorization.

609166543680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13911 (or 13895 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 609166543680 in words is "six hundred nine billion, one hundred sixty-six million, five hundred forty-three thousand, six hundred eighty".