9856536671 has 4 divisors (see below), whose sum is σ = 10122929592. Its totient is φ = 9590143752.

The previous prime is 9856536659. The next prime is 9856536689. The reversal of 9856536671 is 1766356589.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1766356589 = 661 ⋅2672249.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9856536671 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 (9856536601) 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, 133196405 + ... + 133196478.

It is an arithmetic number, because the mean of its divisors is an integer number (2530732398).

Almost surely, 2^9856536671 is an apocalyptic number.

9856536671 is a deficient number, since it is larger than the sum of its proper divisors (266392921).

9856536671 is a wasteful number, since it uses less digits than its factorization.

9856536671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266392920.

The product of its digits is 8164800, while the sum is 56.

The square root of 9856536671 is about 99280.0920174835. The cubic root of 9856536671 is about 2144.0822789225.

The spelling of 9856536671 in words is "nine billion, eight hundred fifty-six million, five hundred thirty-six thousand, six hundred seventy-one".