865350083520 has 168 divisors, whose sum is σ = 3205401073056. Its totient is φ = 213009242112.

The previous prime is 865350083497. The next prime is 865350083531. The reversal of 865350083520 is 25380053568.

865350083520 is a `hidden beast` number, since 8 + 65 + 3 + 500 + 83 + 5 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 11519052 + ... + 11593931.

It is an arithmetic number, because the mean of its divisors is an integer number (19079768292).

Almost surely, 2^865350083520 is an apocalyptic number.

865350083520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

865350083520 is an abundant number, since it is smaller than the sum of its proper divisors (2340050989536).

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

865350083520 is a wasteful number, since it uses less digits than its factorization.

865350083520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23113019 (or 23113006 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 865350083520 in words is "eight hundred sixty-five billion, three hundred fifty million, eighty-three thousand, five hundred twenty".