81071137821114 has 48 divisors (see below), whose sum is σ = 200748827028672. Its totient is φ = 23163038273664.

The previous prime is 81071137821101. The next prime is 81071137821133. The reversal of 81071137821114 is 41112873117018.

81071137821114 is a `hidden beast` number, since 81 + 0 + 71 + 1 + 378 + 21 + 114 = 666.

It is a super-2 number, since 2×81071137821114² (a number of 29 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 81071137821114.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19246597 + ... + 23077559.

It is an arithmetic number, because the mean of its divisors is an integer number (4182267229764).

Almost surely, 2^{81071137821114} is an apocalyptic number.

81071137821114 is an abundant number, since it is smaller than the sum of its proper divisors (119677689207558).

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

81071137821114 is a wasteful number, since it uses less digits than its factorization.

81071137821114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998931 (or 3998928 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 45.

The spelling of 81071137821114 in words is "eighty-one trillion, seventy-one billion, one hundred thirty-seven million, eight hundred twenty-one thousand, one hundred fourteen".