8271687081 has 32 divisors (see below), whose sum is σ = 13048335360. Its totient is φ = 4560462144.

The previous prime is 8271687079. The next prime is 8271687091. The reversal of 8271687081 is 1807861728.

It is not a de Polignac number, because 8271687081 - 2¹ = 8271687079 is a prime.

It is a super-2 number, since 2×8271687081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8271687081.

It is not an unprimeable number, because it can be changed into a prime (8271687001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045366 + ... + 1053248.

It is an arithmetic number, because the mean of its divisors is an integer number (407760480).

Almost surely, 2^8271687081 is an apocalyptic number.

It is an amenable number.

8271687081 is a deficient number, since it is larger than the sum of its proper divisors (4776648279).

8271687081 is a wasteful number, since it uses less digits than its factorization.

8271687081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9645.

The product of its (nonzero) digits is 301056, while the sum is 48.

The square root of 8271687081 is about 90948.8157207118. The cubic root of 8271687081 is about 2022.3890207169.

The spelling of 8271687081 in words is "eight billion, two hundred seventy-one million, six hundred eighty-seven thousand, eighty-one".