865840382208 has 144 divisors (see below), whose sum is σ = 2695202865600. Its totient is φ = 273423237120.

The previous prime is 865840382203. The next prime is 865840382237. The reversal of 865840382208 is 802283048568.

865840382208 is a `hidden beast` number, since 8 + 6 + 5 + 8 + 403 + 8 + 220 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is not an unprimeable number, because it can be changed into a prime (865840382203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3165153 + ... + 3427808.

Almost surely, 2^865840382208 is an apocalyptic number.

It is an amenable number.

865840382208 is an abundant number, since it is smaller than the sum of its proper divisors (1829362483392).

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

865840382208 is a wasteful number, since it uses less digits than its factorization.

865840382208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6593005 (or 6592985 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 865840382208 in words is "eight hundred sixty-five billion, eight hundred forty million, three hundred eighty-two thousand, two hundred eight".