865228282464 has 384 divisors, whose sum is σ = 3043958400000. Its totient is φ = 208726253568.

The previous prime is 865228282463. The next prime is 865228282511. The reversal of 865228282464 is 464282822568.

It is a super-2 number, since 2×865228282464² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865228282463) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4723662 + ... + 4903410.

It is an arithmetic number, because the mean of its divisors is an integer number (7926975000).

Almost surely, 2^865228282464 is an apocalyptic number.

865228282464 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865228282464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1521979200000).

865228282464 is an abundant number, since it is smaller than the sum of its proper divisors (2178730117536).

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

865228282464 is a wasteful number, since it uses less digits than its factorization.

865228282464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179830 (or 179822 counting only the distinct ones).

The product of its digits is 23592960, while the sum is 57.

The spelling of 865228282464 in words is "eight hundred sixty-five billion, two hundred twenty-eight million, two hundred eighty-two thousand, four hundred sixty-four".