864144868793 has 4 divisors (see below), whose sum is σ = 864522721920. Its totient is φ = 863767015668.

The previous prime is 864144868787. The next prime is 864144868817. The reversal of 864144868793 is 397868441468.

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 864144868793 - 2²⁰ = 864143820217 is a prime.

It is a super-2 number, since 2×864144868793² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864144868753) 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, 188923133 + ... + 188927706.

It is an arithmetic number, because the mean of its divisors is an integer number (216130680480).

Almost surely, 2^864144868793 is an apocalyptic number.

It is an amenable number.

864144868793 is a deficient number, since it is larger than the sum of its proper divisors (377853127).

864144868793 is a wasteful number, since it uses less digits than its factorization.

864144868793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377853126.

The product of its digits is 222953472, while the sum is 68.

The spelling of 864144868793 in words is "eight hundred sixty-four billion, one hundred forty-four million, eight hundred sixty-eight thousand, seven hundred ninety-three".