865864429447 has 4 divisors (see below), whose sum is σ = 865884868696. Its totient is φ = 865843990200.

The previous prime is 865864429433. The next prime is 865864429459. The reversal of 865864429447 is 744924468568.

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

It is a cyclic number.

It is not a de Polignac number, because 865864429447 - 2¹⁵ = 865864396679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865864423447) 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, 10155948 + ... + 10240849.

It is an arithmetic number, because the mean of its divisors is an integer number (216471217174).

Almost surely, 2^865864429447 is an apocalyptic number.

865864429447 is a deficient number, since it is larger than the sum of its proper divisors (20439249).

865864429447 is a wasteful number, since it uses less digits than its factorization.

865864429447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20439248.

The product of its digits is 371589120, while the sum is 67.

The spelling of 865864429447 in words is "eight hundred sixty-five billion, eight hundred sixty-four million, four hundred twenty-nine thousand, four hundred forty-seven".