865113806651 has 4 divisors (see below), whose sum is σ = 865194450600. Its totient is φ = 865033162704.

The previous prime is 865113806629. The next prime is 865113806653. The reversal of 865113806651 is 156608311568.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865113806651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 865113806651.

It is not an unprimeable number, because it can be changed into a prime (865113806653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40305881 + ... + 40327338.

It is an arithmetic number, because the mean of its divisors is an integer number (216298612650).

Almost surely, 2^865113806651 is an apocalyptic number.

865113806651 is a deficient number, since it is larger than the sum of its proper divisors (80643949).

865113806651 is a wasteful number, since it uses less digits than its factorization.

865113806651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80643948.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 865113806651 in words is "eight hundred sixty-five billion, one hundred thirteen million, eight hundred six thousand, six hundred fifty-one".