84171511081 has 16 divisors (see below), whose sum is σ = 96365098240. Its totient is φ = 72020301120.

The previous prime is 84171511033. The next prime is 84171511097. The reversal of 84171511081 is 18011517148.

It is a cyclic number.

It is not a de Polignac number, because 84171511081 - 2¹³ = 84171502889 is a prime.

It is a super-3 number, since 3×84171511081³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84171511081.

It is not an unprimeable number, because it can be changed into a prime (84171512081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16193575 + ... + 16198771.

It is an arithmetic number, because the mean of its divisors is an integer number (6022818640).

Almost surely, 2^84171511081 is an apocalyptic number.

It is an amenable number.

84171511081 is a deficient number, since it is larger than the sum of its proper divisors (12193587159).

84171511081 is a wasteful number, since it uses less digits than its factorization.

84171511081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8824.

The product of its (nonzero) digits is 8960, while the sum is 37.

The spelling of 84171511081 in words is "eighty-four billion, one hundred seventy-one million, five hundred eleven thousand, eighty-one".