64854683280 has 240 divisors, whose sum is σ = 222261399360. Its totient is φ = 16942666752.

The previous prime is 64854683279. The next prime is 64854683291. The reversal of 64854683280 is 8238645846.

64854683280 is a `hidden beast` number, since 6 + 485 + 4 + 6 + 83 + 2 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×64854683280² (a number of 22 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 13038874 + ... + 13043846.

It is an arithmetic number, because the mean of its divisors is an integer number (926089164).

Almost surely, 2^64854683280 is an apocalyptic number.

64854683280 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 64854683280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111130699680).

64854683280 is an abundant number, since it is smaller than the sum of its proper divisors (157406716080).

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

64854683280 is a wasteful number, since it uses less digits than its factorization.

64854683280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358 (or 5349 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 54.

The spelling of 64854683280 in words is "sixty-four billion, eight hundred fifty-four million, six hundred eighty-three thousand, two hundred eighty".