81365081030356 has 12 divisors (see below), whose sum is σ = 142404763997440. Its totient is φ = 40678005602520.

The previous prime is 81365081030329. The next prime is 81365081030357. The reversal of 81365081030356 is 65303018056318.

It is a super-2 number, since 2×81365081030356² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81365081030357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1133687796 + ... + 1133759563.

Almost surely, 2^{81365081030356} is an apocalyptic number.

It is an amenable number.

81365081030356 is a deficient number, since it is larger than the sum of its proper divisors (61039682967084).

81365081030356 is a wasteful number, since it uses less digits than its factorization.

81365081030356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267456334 (or 2267456332 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 81365081030356 in words is "eighty-one trillion, three hundred sixty-five billion, eighty-one million, thirty thousand, three hundred fifty-six".