9865581463 has 4 divisors (see below), whose sum is σ = 9866364480. Its totient is φ = 9864798448.

The previous prime is 9865581443. The next prime is 9865581487. The reversal of 9865581463 is 3641855689.

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 9865581463 - 2²¹ = 9863484311 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 (9865581443) 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, 372295 + ... + 397912.

It is an arithmetic number, because the mean of its divisors is an integer number (2466591120).

Almost surely, 2^9865581463 is an apocalyptic number.

9865581463 is a deficient number, since it is larger than the sum of its proper divisors (783017).

9865581463 is a wasteful number, since it uses less digits than its factorization.

9865581463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783016.

The product of its digits is 6220800, while the sum is 55.

The square root of 9865581463 is about 99325.6334638748. The cubic root of 9865581463 is about 2144.7379131825.

It can be divided in two parts, 9865 and 581463, that added together give a triangular number (591328 = T₁₀₈₇).

The spelling of 9865581463 in words is "nine billion, eight hundred sixty-five million, five hundred eighty-one thousand, four hundred sixty-three".