865755648 has 80 divisors (see below), whose sum is σ = 2562737760. Its totient is φ = 288580608.

The previous prime is 865755641. The next prime is 865755743. The reversal of 865755648 is 846557568.

865755648 is a `hidden beast` number, since 8 + 6 + 5 + 75 + 564 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 865755594 and 865755603.

It is not an unprimeable number, because it can be changed into a prime (865755641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17490 + ... + 45137.

It is an arithmetic number, because the mean of its divisors is an integer number (32034222).

Almost surely, 2^865755648 is an apocalyptic number.

It is an amenable number.

865755648 is an abundant number, since it is smaller than the sum of its proper divisors (1696982112).

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

865755648 is an equidigital number, since it uses as much as digits as its factorization.

865755648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62654 (or 62632 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The square root of 865755648 is about 29423.7259367334. The cubic root of 865755648 is about 953.0853144999.

The spelling of 865755648 in words is "eight hundred sixty-five million, seven hundred fifty-five thousand, six hundred forty-eight".