865845055 has 8 divisors (see below), whose sum is σ = 1039334400. Its totient is φ = 692462496.

The previous prime is 865845053. The next prime is 865845061. The reversal of 865845055 is 550548568.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 865845055 - 2¹ = 865845053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 865844996 and 865845014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865845053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7615 + ... + 42304.

It is an arithmetic number, because the mean of its divisors is an integer number (129916800).

Almost surely, 2^865845055 is an apocalyptic number.

865845055 is a deficient number, since it is larger than the sum of its proper divisors (173489345).

865845055 is a wasteful number, since it uses less digits than its factorization.

865845055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53393.

The product of its (nonzero) digits is 960000, while the sum is 46.

The square root of 865845055 is about 29425.2451986385. The cubic root of 865845055 is about 953.1181218961.

The spelling of 865845055 in words is "eight hundred sixty-five million, eight hundred forty-five thousand, fifty-five".