865801134650 has 24 divisors (see below), whose sum is σ = 1610559819360. Its totient is φ = 346283957360.

The previous prime is 865801134647. The next prime is 865801134659. The reversal of 865801134650 is 56431108568.

It is a super-2 number, since 2×865801134650² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 865801134595 and 865801134604.

It is not an unprimeable number, because it can be changed into a prime (865801134659) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 430694 + ... + 1384593.

It is an arithmetic number, because the mean of its divisors is an integer number (67106659140).

Almost surely, 2^865801134650 is an apocalyptic number.

865801134650 is a deficient number, since it is larger than the sum of its proper divisors (744758684710).

865801134650 is a wasteful number, since it uses less digits than its factorization.

865801134650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824838 (or 1824833 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 865801134650 in words is "eight hundred sixty-five billion, eight hundred one million, one hundred thirty-four thousand, six hundred fifty".