65841785856 has 1056 divisors, whose sum is σ = 254075867136. Its totient is φ = 15925248000.

The previous prime is 65841785813. The next prime is 65841785873. The reversal of 65841785856 is 65858714856.

65841785856 is a `hidden beast` number, since 6 + 5 + 8 + 41 + 7 + 8 + 585 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (1056).

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (64512000) is a multiple of the sum of its prime divisors (168).

It is a junction number, because it is equal to n+sod(n) for n = 65841785793 and 65841785802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 901942236 + ... + 901942308.

Almost surely, 2^65841785856 is an apocalyptic number.

65841785856 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 65841785856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127037933568).

65841785856 is an abundant number, since it is smaller than the sum of its proper divisors (188234081280).

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

65841785856 is a wasteful number, since it uses less digits than its factorization.

65841785856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 168 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 63.

The spelling of 65841785856 in words is "sixty-five billion, eight hundred forty-one million, seven hundred eighty-five thousand, eight hundred fifty-six".