618200643456 has 256 divisors, whose sum is σ = 1993939084800. Its totient is φ = 187002224640.

The previous prime is 618200643433. The next prime is 618200643491. The reversal of 618200643456 is 654346002816.

618200643456 is a `hidden beast` number, since 6 + 1 + 8 + 200 + 6 + 434 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21921141 + ... + 21949323.

It is an arithmetic number, because the mean of its divisors is an integer number (7788824550).

Almost surely, 2^618200643456 is an apocalyptic number.

618200643456 is a gapful number since it is divisible by the number (66) 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 618200643456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (996969542400).

618200643456 is an abundant number, since it is smaller than the sum of its proper divisors (1375738441344).

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

618200643456 is a wasteful number, since it uses less digits than its factorization.

618200643456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28794 (or 28776 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 618200643456 in words is "six hundred eighteen billion, two hundred million, six hundred forty-three thousand, four hundred fifty-six".