65780831023208 has 128 divisors (see below), whose sum is σ = 149585871052800. Its totient is φ = 26473911450624.

The previous prime is 65780831023181. The next prime is 65780831023217. The reversal of 65780831023208 is 80232013808756.

It is a happy number.

65780831023208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65780831023208² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65780831023208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 778401485 + ... + 778485987.

It is an arithmetic number, because the mean of its divisors is an integer number (1168639617600).

Almost surely, 2^{65780831023208} is an apocalyptic number.

65780831023208 is a gapful number since it is divisible by the number (68) 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 65780831023208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74792935526400).

65780831023208 is an abundant number, since it is smaller than the sum of its proper divisors (83805040029592).

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

65780831023208 is a wasteful number, since it uses less digits than its factorization.

65780831023208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86359 (or 86355 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 65780831023208 in words is "sixty-five trillion, seven hundred eighty billion, eight hundred thirty-one million, twenty-three thousand, two hundred eight".