81084071076 has 48 divisors (see below), whose sum is σ = 195336798720. Its totient is φ = 26151125760.

The previous prime is 81084071059. The next prime is 81084071093. The reversal of 81084071076 is 67017048018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81084071059) and next prime (81084071093).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2247210 + ... + 2283006.

It is an arithmetic number, because the mean of its divisors is an integer number (4069516640).

Almost surely, 2^81084071076 is an apocalyptic number.

It is an amenable number.

81084071076 is an abundant number, since it is smaller than the sum of its proper divisors (114252727644).

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

81084071076 is a wasteful number, since it uses less digits than its factorization.

81084071076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41924 (or 41922 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The spelling of 81084071076 in words is "eighty-one billion, eighty-four million, seventy-one thousand, seventy-six".