868764672609 has 4 divisors (see below), whose sum is σ = 1158352896816. Its totient is φ = 579176448404.

The previous prime is 868764672577. The next prime is 868764672623. The reversal of 868764672609 is 906276467868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 868764672609 - 2⁵ = 868764672577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (868764672649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144794112099 + ... + 144794112104.

It is an arithmetic number, because the mean of its divisors is an integer number (289588224204).

Almost surely, 2^868764672609 is an apocalyptic number.

It is an amenable number.

868764672609 is a deficient number, since it is larger than the sum of its proper divisors (289588224207).

868764672609 is a wasteful number, since it uses less digits than its factorization.

868764672609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289588224206.

The product of its (nonzero) digits is 292626432, while the sum is 69.

The spelling of 868764672609 in words is "eight hundred sixty-eight billion, seven hundred sixty-four million, six hundred seventy-two thousand, six hundred nine".