81023214086044 has 24 divisors (see below), whose sum is σ = 142799550602688. Its totient is φ = 40224362892480.

The previous prime is 81023214086011. The next prime is 81023214086063. The reversal of 81023214086044 is 44068041232018.

It is a super-2 number, since 2×81023214086044² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127233007 + ... + 127868230.

It is an arithmetic number, because the mean of its divisors is an integer number (5949981275112).

Almost surely, 2^{81023214086044} is an apocalyptic number.

It is an amenable number.

81023214086044 is a deficient number, since it is larger than the sum of its proper divisors (61776336516644).

81023214086044 is a wasteful number, since it uses less digits than its factorization.

81023214086044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255101805 (or 255101803 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 43.

The spelling of 81023214086044 in words is "eighty-one trillion, twenty-three billion, two hundred fourteen million, eighty-six thousand, forty-four".