81295116 has 48 divisors (see below), whose sum is σ = 221222400. Its totient is φ = 23226000.

The previous prime is 81295103. The next prime is 81295147. The reversal of 81295116 is 61159218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5760 + ... + 13991.

It is an arithmetic number, because the mean of its divisors is an integer number (4608800).

Almost surely, 2^81295116 is an apocalyptic number.

It is an amenable number.

81295116 is an abundant number, since it is smaller than the sum of its proper divisors (139927284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81295116 is a wasteful number, since it uses less digits than its factorization.

81295116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19779 (or 19763 counting only the distinct ones).

The product of its digits is 4320, while the sum is 33.

The square root of 81295116 is about 9016.3804267566. The cubic root of 81295116 is about 433.1997044902.

The spelling of 81295116 in words is "eighty-one million, two hundred ninety-five thousand, one hundred sixteen".