865484138112 has 192 divisors, whose sum is σ = 2529924425280. Its totient is φ = 261957836800.

The previous prime is 865484138093. The next prime is 865484138131. The reversal of 865484138112 is 211831484568.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (865484138093) and next prime (865484138131).

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 40924213 + ... + 40945355.

It is an arithmetic number, because the mean of its divisors is an integer number (13176689715).

Almost surely, 2^865484138112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865484138112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1264962212640).

865484138112 is an abundant number, since it is smaller than the sum of its proper divisors (1664440287168).

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

865484138112 is a wasteful number, since it uses less digits than its factorization.

865484138112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22063 (or 22040 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 51.

The spelling of 865484138112 in words is "eight hundred sixty-five billion, four hundred eighty-four million, one hundred thirty-eight thousand, one hundred twelve".