81067704810 has 32 divisors (see below), whose sum is σ = 194585276160. Its totient is φ = 21615523008.

The previous prime is 81067704793. The next prime is 81067704811. The reversal of 81067704810 is 1840776018.

It is a happy number.

It is a super-2 number, since 2×81067704810² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81067704811) by changing a digit.

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, 109656 + ... + 417324.

It is an arithmetic number, because the mean of its divisors is an integer number (6080789880).

Almost surely, 2^81067704810 is an apocalyptic number.

81067704810 is an abundant number, since it is smaller than the sum of its proper divisors (113517571350).

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

81067704810 is a wasteful number, since it uses less digits than its factorization.

81067704810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316462.

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

The spelling of 81067704810 in words is "eighty-one billion, sixty-seven million, seven hundred four thousand, eight hundred ten".