10865987809 has 8 divisors (see below), whose sum is σ = 10913696640. Its totient is φ = 10818327936.

The previous prime is 10865987791. The next prime is 10865987827. The reversal of 10865987809 is 90878956801.

It is an interprime number because it is at equal distance from previous prime (10865987791) and next prime (10865987827).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10865987809 - 2⁵ = 10865987777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10865987849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474577 + ... + 496945.

It is an arithmetic number, because the mean of its divisors is an integer number (1364212080).

Almost surely, 2^10865987809 is an apocalyptic number.

It is an amenable number.

10865987809 is a deficient number, since it is larger than the sum of its proper divisors (47708831).

10865987809 is a wasteful number, since it uses less digits than its factorization.

10865987809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24479.

The product of its (nonzero) digits is 8709120, while the sum is 61.

It can be divided in two parts, 1086 and 5987809, that added together give a palindrome (5988895).

The spelling of 10865987809 in words is "ten billion, eight hundred sixty-five million, nine hundred eighty-seven thousand, eight hundred nine".