865802277813 has 16 divisors (see below), whose sum is σ = 1259388472896. Its totient is φ = 524712109440.

The previous prime is 865802277779. The next prime is 865802277839. The reversal of 865802277813 is 318772208568.

It is not a de Polignac number, because 865802277813 - 2¹⁶ = 865802212277 is a prime.

It is a super-2 number, since 2×865802277813² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865802277913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693145 + ... + 1487297.

It is an arithmetic number, because the mean of its divisors is an integer number (78711779556).

Almost surely, 2^865802277813 is an apocalyptic number.

It is an amenable number.

865802277813 is a deficient number, since it is larger than the sum of its proper divisors (393586195083).

865802277813 is a wasteful number, since it uses less digits than its factorization.

865802277813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827204.

The product of its (nonzero) digits is 9031680, while the sum is 57.

The spelling of 865802277813 in words is "eight hundred sixty-five billion, eight hundred two million, two hundred seventy-seven thousand, eight hundred thirteen".