9861164271 has 24 divisors (see below), whose sum is σ = 16284213920. Its totient is φ = 5633058816.

The previous prime is 9861164251. The next prime is 9861164281. The reversal of 9861164271 is 1724611689.

9861164271 is a `hidden beast` number, since 9 + 8 + 611 + 6 + 4 + 27 + 1 = 666.

It is not a de Polignac number, because 9861164271 - 2²⁹ = 9324293359 is a prime.

It is a super-2 number, since 2×9861164271² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9861164251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174951 + ... + 224343.

Almost surely, 2^9861164271 is an apocalyptic number.

9861164271 is a deficient number, since it is larger than the sum of its proper divisors (6423049649).

9861164271 is a wasteful number, since it uses less digits than its factorization.

9861164271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52575 (or 52572 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 9861164271 is about 99303.3950628074. The cubic root of 9861164271 is about 2144.4177721125.

The spelling of 9861164271 in words is "nine billion, eight hundred sixty-one million, one hundred sixty-four thousand, two hundred seventy-one".