865457055 has 40 divisors (see below), whose sum is σ = 1553640000. Its totient is φ = 460914624.

The previous prime is 865457053. The next prime is 865457059. The reversal of 865457055 is 550754568.

It is not a de Polignac number, because 865457055 - 2¹ = 865457053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 865457055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865457053) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 431946 + ... + 433944.

It is an arithmetic number, because the mean of its divisors is an integer number (38841000).

Almost surely, 2^865457055 is an apocalyptic number.

865457055 is a deficient number, since it is larger than the sum of its proper divisors (688182945).

865457055 is a wasteful number, since it uses less digits than its factorization.

865457055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085 (or 3076 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The square root of 865457055 is about 29418.6514816706. The cubic root of 865457055 is about 952.9757311060.

The spelling of 865457055 in words is "eight hundred sixty-five million, four hundred fifty-seven thousand, fifty-five".