865317276450 has 432 divisors, whose sum is σ = 2715359643360. Its totient is φ = 196850649600.

The previous prime is 865317276449. The next prime is 865317276457. The reversal of 865317276450 is 54672713568.

865317276450 is a `hidden beast` number, since 8 + 6 + 5 + 317 + 276 + 4 + 50 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (865317276457) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 110692942 + ... + 110700758.

It is an arithmetic number, because the mean of its divisors is an integer number (6285554730).

Almost surely, 2^865317276450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865317276450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1357679821680).

865317276450 is an abundant number, since it is smaller than the sum of its proper divisors (1850042366910).

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

865317276450 is a wasteful number, since it uses less digits than its factorization.

865317276450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7983 (or 7964 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 865317276450 in words is "eight hundred sixty-five billion, three hundred seventeen million, two hundred seventy-six thousand, four hundred fifty".