865363071379968 has 1280 divisors, whose sum is σ = 3134385053184000. Its totient is φ = 230222949580800.

The previous prime is 865363071379957. The next prime is 865363071379973. The reversal of 865363071379968 is 869973170363568.

865363071379968 is a `hidden beast` number, since 8 + 6 + 5 + 36 + 307 + 137 + 99 + 68 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 244383808278 + ... + 244383811818.

It is an arithmetic number, because the mean of its divisors is an integer number (2448738322800).

Almost surely, 2^{865363071379968} 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 865363071379968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1567192526592000).

865363071379968 is an abundant number, since it is smaller than the sum of its proper divisors (2269021981804032).

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

865363071379968 is a wasteful number, since it uses less digits than its factorization.

865363071379968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 7407106560, while the sum is 81.

The spelling of 865363071379968 in words is "eight hundred sixty-five trillion, three hundred sixty-three billion, seventy-one million, three hundred seventy-nine thousand, nine hundred sixty-eight".