81067746834 has 64 divisors (see below), whose sum is σ = 190696809600. Its totient is φ = 25483985856.

The previous prime is 81067746811. The next prime is 81067746883. The reversal of 81067746834 is 43864776018.

81067746834 is a `hidden beast` number, since 8 + 106 + 77 + 468 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 31 ways as a sum of consecutive naturals, for example, 534609 + ... + 669284.

It is an arithmetic number, because the mean of its divisors is an integer number (2979637650).

Almost surely, 2^81067746834 is an apocalyptic number.

81067746834 is an abundant number, since it is smaller than the sum of its proper divisors (109629062766).

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

81067746834 is a wasteful number, since it uses less digits than its factorization.

81067746834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203976 (or 1203970 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 81067746834 in words is "eighty-one billion, sixty-seven million, seven hundred forty-six thousand, eight hundred thirty-four".