8102471781081 has 32 divisors (see below), whose sum is σ = 11275761316480. Its totient is φ = 5170372010496.

The previous prime is 8102471781031. The next prime is 8102471781133. The reversal of 8102471781081 is 1801871742018.

It is not a de Polignac number, because 8102471781081 - 2⁹ = 8102471780569 is a prime.

It is a super-2 number, since 2×8102471781081² (a number of 27 digits) contains 22 as substring.

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 8102471781081.

It is not an unprimeable number, because it can be changed into a prime (8102471781031) 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, 4910205 + ... + 6349413.

It is an arithmetic number, because the mean of its divisors is an integer number (352367541140).

Almost surely, 2^{8102471781081} is an apocalyptic number.

It is an amenable number.

8102471781081 is a deficient number, since it is larger than the sum of its proper divisors (3173289535399).

8102471781081 is a wasteful number, since it uses less digits than its factorization.

8102471781081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440073.

The product of its (nonzero) digits is 200704, while the sum is 48.

The spelling of 8102471781081 in words is "eight trillion, one hundred two billion, four hundred seventy-one million, seven hundred eighty-one thousand, eighty-one".